1242958631 has 4 divisors (see below), whose sum is σ = 1263335064. Its totient is φ = 1222582200.

The previous prime is 1242958627. The next prime is 1242958657. The reversal of 1242958631 is 1368592421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1368592421 = 7 ⋅195513203.

It is a cyclic number.

It is not a de Polignac number, because 1242958631 - 2² = 1242958627 is a prime.

It is a super-2 number, since 2×1242958631² = 3089892316754788322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242958231) 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, 10188125 + ... + 10188246.

It is an arithmetic number, because the mean of its divisors is an integer number (315833766).

Almost surely, 2^1242958631 is an apocalyptic number.

1242958631 is a deficient number, since it is larger than the sum of its proper divisors (20376433).

1242958631 is an equidigital number, since it uses as much as digits as its factorization.

1242958631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20376432.

The product of its digits is 103680, while the sum is 41.

The square root of 1242958631 is about 35255.6184316770. The cubic root of 1242958631 is about 1075.1908457997.

The spelling of 1242958631 in words is "one billion, two hundred forty-two million, nine hundred fifty-eight thousand, six hundred thirty-one".