725131 has 4 divisors (see below), whose sum is σ = 791064. Its totient is φ = 659200.

The previous prime is 725119. The next prime is 725147. The reversal of 725131 is 131527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725131 - 2⁵ = 725099 is a prime.

It is a super-2 number, since 2×725131² = 1051629934322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725099 and 725108.

It is not an unprimeable number, because it can be changed into a prime (725111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32950 + ... + 32971.

It is an arithmetic number, because the mean of its divisors is an integer number (197766).

2⁷²⁵¹³¹ is an apocalyptic number.

725131 is a deficient number, since it is larger than the sum of its proper divisors (65933).

725131 is a wasteful number, since it uses less digits than its factorization.

725131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65932.

The product of its digits is 210, while the sum is 19.

The square root of 725131 is about 851.5462406705. The cubic root of 725131 is about 89.8404993884.

Adding to 725131 its reverse (131527), we get a palindrome (856658).

The spelling of 725131 in words is "seven hundred twenty-five thousand, one hundred thirty-one".