999540725 has 12 divisors (see below), whose sum is σ = 1247643360. Its totient is φ = 794334000.

The previous prime is 999540713. The next prime is 999540757. The reversal of 999540725 is 527045999.

It is a happy number.

It is not a de Polignac number, because 999540725 - 2²⁰ = 998492149 is a prime.

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, 128615 + ... + 136164.

It is an arithmetic number, because the mean of its divisors is an integer number (103970280).

Almost surely, 2^999540725 is an apocalyptic number.

It is an amenable number.

999540725 is a deficient number, since it is larger than the sum of its proper divisors (248102635).

999540725 is a wasteful number, since it uses less digits than its factorization.

999540725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264940 (or 264935 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 999540725 is about 31615.5139923424. The cubic root of 999540725 is about 999.8468848903.

The spelling of 999540725 in words is "nine hundred ninety-nine million, five hundred forty thousand, seven hundred twenty-five".