143423257 has 4 divisors (see below), whose sum is σ = 143447220. Its totient is φ = 143399296.

The previous prime is 143423251. The next prime is 143423263. The reversal of 143423257 is 752324341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 752324341 = 17 ⋅44254373.

It is an interprime number because it is at equal distance from previous prime (143423251) and next prime (143423263).

It can be written as a sum of positive squares in 2 ways, for example, as 33362176 + 110061081 = 5776^2 + 10491^2 .

It is a cyclic number.

It is not a de Polignac number, because 143423257 - 2³ = 143423249 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143423251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5469 + ... + 17797.

It is an arithmetic number, because the mean of its divisors is an integer number (35861805).

Almost surely, 2^143423257 is an apocalyptic number.

It is an amenable number.

143423257 is a deficient number, since it is larger than the sum of its proper divisors (23963).

143423257 is a wasteful number, since it uses less digits than its factorization.

143423257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23962.

The product of its digits is 20160, while the sum is 31.

The square root of 143423257 is about 11975.9449314031. The cubic root of 143423257 is about 523.4475766745.

Adding to 143423257 its reverse (752324341), we get a palindrome (895747598).

The spelling of 143423257 in words is "one hundred forty-three million, four hundred twenty-three thousand, two hundred fifty-seven".