725174861 has 4 divisors (see below), whose sum is σ = 725243232. Its totient is φ = 725106492.

The previous prime is 725174837. The next prime is 725174869. The reversal of 725174861 is 168471527.

725174861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 725174861 - 2¹⁸ = 724912717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725174869) 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, 14495 + ... + 40748.

It is an arithmetic number, because the mean of its divisors is an integer number (181310808).

Almost surely, 2^725174861 is an apocalyptic number.

It is an amenable number.

725174861 is a deficient number, since it is larger than the sum of its proper divisors (68371).

725174861 is a wasteful number, since it uses less digits than its factorization.

725174861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68370.

The product of its digits is 94080, while the sum is 41.

The square root of 725174861 is about 26929.0709271597. The cubic root of 725174861 is about 898.4231074600.

The spelling of 725174861 in words is "seven hundred twenty-five million, one hundred seventy-four thousand, eight hundred sixty-one".