1142355231 has 20 divisors (see below), whose sum is σ = 1713650400. Its totient is φ = 758370816.

The previous prime is 1142355223. The next prime is 1142355233. The reversal of 1142355231 is 1325532411.

1142355231 is a `hidden beast` number, since 1 + 1 + 423 + 5 + 5 + 231 = 666.

It is not a de Polignac number, because 1142355231 - 2³ = 1142355223 is a prime.

It is a super-2 number, since 2×1142355231² = 2609950947586126722, 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 = 1142355195 and 1142355204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142355233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10146 + ... + 48863.

It is an arithmetic number, because the mean of its divisors is an integer number (85682520).

Almost surely, 2^1142355231 is an apocalyptic number.

1142355231 is a deficient number, since it is larger than the sum of its proper divisors (571295169).

1142355231 is an equidigital number, since it uses as much as digits as its factorization.

1142355231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59260 (or 59251 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1142355231 is about 33798.7459974479. The cubic root of 1142355231 is about 1045.3628406612.

Adding to 1142355231 its reverse (1325532411), we get a palindrome (2467887642).

The spelling of 1142355231 in words is "one billion, one hundred forty-two million, three hundred fifty-five thousand, two hundred thirty-one".