725018 has 8 divisors (see below), whose sum is σ = 1242912. Its totient is φ = 310716.

The previous prime is 725009. The next prime is 725041. The reversal of 725018 is 810527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×725018² = 1051302200648, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 724984 and 725002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25880 + ... + 25907.

It is an arithmetic number, because the mean of its divisors is an integer number (155364).

2⁷²⁵⁰¹⁸ is an apocalyptic number.

725018 is a deficient number, since it is larger than the sum of its proper divisors (517894).

725018 is a wasteful number, since it uses less digits than its factorization.

725018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51796.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 725018 is about 851.4798881947. The cubic root of 725018 is about 89.8358324138.

The spelling of 725018 in words is "seven hundred twenty-five thousand, eighteen".