1231251825 has 48 divisors (see below), whose sum is σ = 2099865600. Its totient is φ = 636283200.

The previous prime is 1231251823. The next prime is 1231251829. The reversal of 1231251825 is 5281521321.

It is not a de Polignac number, because 1231251825 - 2¹ = 1231251823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231251792 and 1231251801.

It is not an unprimeable number, because it can be changed into a prime (1231251823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312216 + ... + 316134.

It is an arithmetic number, because the mean of its divisors is an integer number (43747200).

Almost surely, 2^1231251825 is an apocalyptic number.

1231251825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231251825 is a deficient number, since it is larger than the sum of its proper divisors (868613775).

1231251825 is a wasteful number, since it uses less digits than its factorization.

1231251825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062 (or 4057 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1231251825 is about 35089.1981242091. The cubic root of 1231251825 is about 1071.8046307222.

The spelling of 1231251825 in words is "one billion, two hundred thirty-one million, two hundred fifty-one thousand, eight hundred twenty-five".