1520785925 has 12 divisors (see below), whose sum is σ = 1897348800. Its totient is φ = 1209161520.

The previous prime is 1520785913. The next prime is 1520785963. The reversal of 1520785925 is 5295870251.

It is a de Polignac number, because none of the positive numbers 2^k-1520785925 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182525 + ... + 190674.

It is an arithmetic number, because the mean of its divisors is an integer number (158112400).

Almost surely, 2^1520785925 is an apocalyptic number.

It is an amenable number.

1520785925 is a deficient number, since it is larger than the sum of its proper divisors (376562875).

1520785925 is a wasteful number, since it uses less digits than its factorization.

1520785925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373372 (or 373367 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 1520785925 is about 38997.2553521398. The cubic root of 1520785925 is about 1149.9775483960.

The spelling of 1520785925 in words is "one billion, five hundred twenty million, seven hundred eighty-five thousand, nine hundred twenty-five".