1231425356 has 12 divisors (see below), whose sum is σ = 2462850768. Its totient is φ = 527753712.

The previous prime is 1231425353. The next prime is 1231425389. The reversal of 1231425356 is 6535241321.

It is a happy number.

1231425356 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1231425353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21989711 + ... + 21989766.

It is an arithmetic number, because the mean of its divisors is an integer number (205237564).

Almost surely, 2^1231425356 is an apocalyptic number.

It is an amenable number.

1231425356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231425356 is a wasteful number, since it uses less digits than its factorization.

1231425356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43979488 (or 43979486 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 1231425356 is about 35091.6707496238. The cubic root of 1231425356 is about 1071.8549812647.

Adding to 1231425356 its reverse (6535241321), we get a palindrome (7766666677).

The spelling of 1231425356 in words is "one billion, two hundred thirty-one million, four hundred twenty-five thousand, three hundred fifty-six".