725861 has 2 divisors, whose sum is σ = 725862. Its totient is φ = 725860.

The previous prime is 725827. The next prime is 725863. The reversal of 725861 is 168527.

725861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 101761 = 790^2 + 319^2 .

It is an emirp because it is prime and its reverse (168527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725861 - 2¹⁰ = 724837 is a prime.

Together with 725863, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₅₈₄₇₅ and since 725861 and 58475 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362930 + 362931.

It is an arithmetic number, because the mean of its divisors is an integer number (362931).

2⁷²⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

725861 is a deficient number, since it is larger than the sum of its proper divisors (1).

725861 is an equidigital number, since it uses as much as digits as its factorization.

725861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 725861 is about 851.9747648845. The cubic root of 725861 is about 89.8706371928.

The spelling of 725861 in words is "seven hundred twenty-five thousand, eight hundred sixty-one".