142911431 has 4 divisors (see below), whose sum is σ = 153904632. Its totient is φ = 131918232.

The previous prime is 142911409. The next prime is 142911487. The reversal of 142911431 is 134119241.

It is a happy number.

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 142911431 - 2¹⁰ = 142910407 is a prime.

It is a super-2 number, since 2×142911431² = 40847354220935522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142911431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142911491) 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, 5496581 + ... + 5496606.

It is an arithmetic number, because the mean of its divisors is an integer number (38476158).

Almost surely, 2^142911431 is an apocalyptic number.

142911431 is a deficient number, since it is larger than the sum of its proper divisors (10993201).

142911431 is a wasteful number, since it uses less digits than its factorization.

142911431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10993200.

The product of its digits is 864, while the sum is 26.

The square root of 142911431 is about 11954.5569135790. The cubic root of 142911431 is about 522.8241691588.

The spelling of 142911431 in words is "one hundred forty-two million, nine hundred eleven thousand, four hundred thirty-one".