143601391 has 4 divisors (see below), whose sum is σ = 143654512. Its totient is φ = 143548272.

The previous prime is 143601389. The next prime is 143601421. The reversal of 143601391 is 193106341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143601391 - 2¹ = 143601389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143605391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22275 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (35913628).

Almost surely, 2^143601391 is an apocalyptic number.

143601391 is a deficient number, since it is larger than the sum of its proper divisors (53121).

143601391 is an equidigital number, since it uses as much as digits as its factorization.

143601391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53120.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 143601391 is about 11983.3797820148. The cubic root of 143601391 is about 523.6641971300.

It can be divided in two parts, 14360 and 1391, that added together give a palindrome (15751).

The spelling of 143601391 in words is "one hundred forty-three million, six hundred one thousand, three hundred ninety-one".