1239061725 has 96 divisors (see below), whose sum is σ = 2614118400. Its totient is φ = 569073600.

The previous prime is 1239061709. The next prime is 1239061729. The reversal of 1239061725 is 5271609321.

1239061725 is a `hidden beast` number, since 1 + 2 + 39 + 0 + 617 + 2 + 5 = 666.

It is not a de Polignac number, because 1239061725 - 2⁴ = 1239061709 is a prime.

Together with 1375056675 it forms an amicable pair .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1239061725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239061729) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 136684 + ... + 145466.

It is an arithmetic number, because the mean of its divisors is an integer number (27230400).

Almost surely, 2^1239061725 is an apocalyptic number.

1239061725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1239061725 is an abundant number, since it is smaller than the sum of its proper divisors (1375056675).

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

1239061725 is a wasteful number, since it uses less digits than its factorization.

1239061725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832 (or 8821 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1239061725 is about 35200.3085923973. The cubic root of 1239061725 is about 1074.0660285238.

The spelling of 1239061725 in words is "one billion, two hundred thirty-nine million, sixty-one thousand, seven hundred twenty-five".