1231651425 has 12 divisors (see below), whose sum is σ = 2036330480. Its totient is φ = 656880720.

The previous prime is 1231651417. The next prime is 1231651429. The reversal of 1231651425 is 5241561321.

It is not a de Polignac number, because 1231651425 - 2³ = 1231651417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231651392 and 1231651401.

It is not an unprimeable number, because it can be changed into a prime (1231651429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8210935 + ... + 8211084.

Almost surely, 2^1231651425 is an apocalyptic number.

1231651425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231651425 is a deficient number, since it is larger than the sum of its proper divisors (804679055).

1231651425 is a wasteful number, since it uses less digits than its factorization.

1231651425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16422032 (or 16422027 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 1231651425 is about 35094.8917223006. The cubic root of 1231651425 is about 1071.9205687716.

The spelling of 1231651425 in words is "one billion, two hundred thirty-one million, six hundred fifty-one thousand, four hundred twenty-five".