1231123252 has 6 divisors (see below), whose sum is σ = 2154465698. Its totient is φ = 615561624.

The previous prime is 1231123247. The next prime is 1231123253. The reversal of 1231123252 is 2523211321.

It can be written as a sum of positive squares in only one way, i.e., 1230887056 + 236196 = 35084^2 + 486^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231123253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153890403 + ... + 153890410.

Almost surely, 2^1231123252 is an apocalyptic number.

It is an amenable number.

1231123252 is a deficient number, since it is larger than the sum of its proper divisors (923342446).

1231123252 is a wasteful number, since it uses less digits than its factorization.

1231123252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307780817 (or 307780815 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1231123252 is about 35087.3659883440. The cubic root of 1231123252 is about 1071.7673218275.

Adding to 1231123252 its reverse (2523211321), we get a palindrome (3754334573).

The spelling of 1231123252 in words is "one billion, two hundred thirty-one million, one hundred twenty-three thousand, two hundred fifty-two".