142423511 has 4 divisors (see below), whose sum is σ = 144374592. Its totient is φ = 140472432.

The previous prime is 142423499. The next prime is 142423513. The reversal of 142423511 is 115324241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115324241 = 277 ⋅416333.

It is a cyclic number.

It is not a de Polignac number, because 142423511 - 2¹⁰ = 142422487 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 (142423513) 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, 975431 + ... + 975576.

It is an arithmetic number, because the mean of its divisors is an integer number (36093648).

Almost surely, 2^142423511 is an apocalyptic number.

142423511 is a deficient number, since it is larger than the sum of its proper divisors (1951081).

142423511 is an equidigital number, since it uses as much as digits as its factorization.

142423511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951080.

The product of its digits is 960, while the sum is 23.

The square root of 142423511 is about 11934.1321846207. The cubic root of 142423511 is about 522.2284919841.

Adding to 142423511 its reverse (115324241), we get a palindrome (257747752).

The spelling of 142423511 in words is "one hundred forty-two million, four hundred twenty-three thousand, five hundred eleven".