142235631 has 12 divisors (see below), whose sum is σ = 205638160. Its totient is φ = 94737600.

The previous prime is 142235627. The next prime is 142235641. The reversal of 142235631 is 136532241.

142235631 is a `hidden beast` number, since 1 + 4 + 2 + 23 + 5 + 631 = 666.

It is not a de Polignac number, because 142235631 - 2² = 142235627 is a prime.

It is a super-2 number, since 2×142235631² = 40461949451936322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142235595 and 142235604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142235641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4230 + ... + 17388.

Almost surely, 2^142235631 is an apocalyptic number.

142235631 is a deficient number, since it is larger than the sum of its proper divisors (63402529).

142235631 is a wasteful number, since it uses less digits than its factorization.

142235631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14366 (or 14363 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 142235631 is about 11926.2580468477. The cubic root of 142235631 is about 521.9987558873.

Adding to 142235631 its reverse (136532241), we get a palindrome (278767872).

The spelling of 142235631 in words is "one hundred forty-two million, two hundred thirty-five thousand, six hundred thirty-one".