1231583725 has 12 divisors (see below), whose sum is σ = 1531101780. Its totient is φ = 982726400.

The previous prime is 1231583719. The next prime is 1231583767. The reversal of 1231583725 is 5273851321.

It can be written as a sum of positive squares in 6 ways, for example, as 218625796 + 1012957929 = 14786^2 + 31827^2 .

It is not a de Polignac number, because 1231583725 - 2²⁵ = 1198029293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53596 + ... + 73045.

It is an arithmetic number, because the mean of its divisors is an integer number (127591815).

Almost surely, 2^1231583725 is an apocalyptic number.

It is an amenable number.

1231583725 is a deficient number, since it is larger than the sum of its proper divisors (299518055).

1231583725 is a wasteful number, since it uses less digits than its factorization.

1231583725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127040 (or 127035 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 1231583725 is about 35093.9271812090. The cubic root of 1231583725 is about 1071.9009283791.

The spelling of 1231583725 in words is "one billion, two hundred thirty-one million, five hundred eighty-three thousand, seven hundred twenty-five".