725155000 has 40 divisors (see below), whose sum is σ = 1699049880. Its totient is φ = 290060000.

The previous prime is 725154977. The next prime is 725155019. The reversal of 725155000 is 551527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 67516 + ... + 77515.

It is an arithmetic number, because the mean of its divisors is an integer number (42476247).

Almost surely, 2^725155000 is an apocalyptic number.

It is an amenable number.

725155000 is an abundant number, since it is smaller than the sum of its proper divisors (973894880).

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

725155000 is a wasteful number, since it uses less digits than its factorization.

725155000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145057 (or 145038 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 725155000 is about 26928.7021595917. The cubic root of 725155000 is about 898.4149054179.

The spelling of 725155000 in words is "seven hundred twenty-five million, one hundred fifty-five thousand".