15783125 has 10 divisors (see below), whose sum is σ = 19723374. Its totient is φ = 12626000.

The previous prime is 15783121. The next prime is 15783133. The reversal of 15783125 is 52138751.

It can be written as a sum of positive squares in 5 ways, for example, as 2292196 + 13490929 = 1514^2 + 3673^2 .

It is not a de Polignac number, because 15783125 - 2² = 15783121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15783091 and 15783100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15783121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12002 + ... + 13251.

Almost surely, 2^15783125 is an apocalyptic number.

It is an amenable number.

15783125 is a deficient number, since it is larger than the sum of its proper divisors (3940249).

15783125 is an frugal number, since it uses more digits than its factorization.

15783125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25273 (or 25258 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 15783125 is about 3972.7981322992. The cubic root of 15783125 is about 250.8405043761.

The spelling of 15783125 in words is "fifteen million, seven hundred eighty-three thousand, one hundred twenty-five".