725513 has 4 divisors (see below), whose sum is σ = 730128. Its totient is φ = 720900.

The previous prime is 725507. The next prime is 725519. The reversal of 725513 is 315527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (725507) and next prime (725519).

It is a cyclic number.

It is not a de Polignac number, because 725513 - 2⁶ = 725449 is a prime.

It is a super-2 number, since 2×725513² = 1052738226338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725519) by changing a digit.

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, 2063 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (182532).

2⁷²⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

725513 is a deficient number, since it is larger than the sum of its proper divisors (4615).

725513 is a wasteful number, since it uses less digits than its factorization.

725513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614.

The product of its digits is 1050, while the sum is 23.

The square root of 725513 is about 851.7705089988. The cubic root of 725513 is about 89.8562726515.

The spelling of 725513 in words is "seven hundred twenty-five thousand, five hundred thirteen".