1231142252 has 24 divisors (see below), whose sum is σ = 2296014336. Its totient is φ = 576277328.

The previous prime is 1231142239. The next prime is 1231142267. The reversal of 1231142252 is 2522411321.

It is a super-2 number, since 2×1231142252² = 3031422489319263008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138038 + ... + 146685.

It is an arithmetic number, because the mean of its divisors is an integer number (95667264).

Almost surely, 2^1231142252 is an apocalyptic number.

It is an amenable number.

1231142252 is a deficient number, since it is larger than the sum of its proper divisors (1064872084).

1231142252 is a wasteful number, since it uses less digits than its factorization.

1231142252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284797 (or 284795 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1231142252 is about 35087.6367400257. The cubic root of 1231142252 is about 1071.7728353492.

Adding to 1231142252 its reverse (2522411321), we get a palindrome (3753553573).

The spelling of 1231142252 in words is "one billion, two hundred thirty-one million, one hundred forty-two thousand, two hundred fifty-two".