625861 has 2 divisors, whose sum is σ = 625862. Its totient is φ = 625860.

The previous prime is 625837. The next prime is 625871. The reversal of 625861 is 168526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516961 + 108900 = 719^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 625861 - 2¹⁷ = 494789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312930 + 312931.

It is an arithmetic number, because the mean of its divisors is an integer number (312931).

2⁶²⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

625861 is a deficient number, since it is larger than the sum of its proper divisors (1).

625861 is an equidigital number, since it uses as much as digits as its factorization.

625861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 625861 is about 791.1137718432. The cubic root of 625861 is about 85.5380403667.

The spelling of 625861 in words is "six hundred twenty-five thousand, eight hundred sixty-one".