123987625 has 8 divisors (see below), whose sum is σ = 154736712. Its totient is φ = 99190000.

The previous prime is 123987607. The next prime is 123987659. The reversal of 123987625 is 526789321.

It can be written as a sum of positive squares in 4 ways, for example, as 1929321 + 122058304 = 1389^2 + 11048^2 .

It is not a de Polignac number, because 123987625 - 2⁹ = 123987113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495826 + ... + 496075.

It is an arithmetic number, because the mean of its divisors is an integer number (19342089).

Almost surely, 2^123987625 is an apocalyptic number.

It is an amenable number.

123987625 is a deficient number, since it is larger than the sum of its proper divisors (30749087).

123987625 is an frugal number, since it uses more digits than its factorization.

123987625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991916 (or 991906 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 123987625 is about 11134.9730578929. The cubic root of 123987625 is about 498.6465060811.

The spelling of 123987625 in words is "one hundred twenty-three million, nine hundred eighty-seven thousand, six hundred twenty-five".