1242633231 has 48 divisors (see below), whose sum is σ = 2239328000. Its totient is φ = 672686208.

The previous prime is 1242633211. The next prime is 1242633263. The reversal of 1242633231 is 1323362421.

1242633231 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 633 + 23 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1242633231 is a prime.

It is a super-2 number, since 2×1242633231² = 3088274693570998722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1242633195 and 1242633204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242633211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13095 + ... + 51543.

Almost surely, 2^1242633231 is an apocalyptic number.

1242633231 is a deficient number, since it is larger than the sum of its proper divisors (996694769).

1242633231 is an equidigital number, since it uses as much as digits as its factorization.

1242633231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38490 (or 38478 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1242633231 is about 35251.0032623186. The cubic root of 1242633231 is about 1075.0970111839.

Adding to 1242633231 its reverse (1323362421), we get a palindrome (2565995652).

The spelling of 1242633231 in words is "one billion, two hundred forty-two million, six hundred thirty-three thousand, two hundred thirty-one".