291625025 has 6 divisors (see below), whose sum is σ = 361615062. Its totient is φ = 233300000.

The previous prime is 291625007. The next prime is 291625043. The reversal of 291625025 is 520526192.

It is an interprime number because it is at equal distance from previous prime (291625007) and next prime (291625043).

It can be written as a sum of positive squares in 3 ways, for example, as 2930944 + 288694081 = 1712^2 + 16991^2 .

It is not a de Polignac number, because 291625025 - 2²⁴ = 274847809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 291624982 and 291625000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5832476 + ... + 5832525.

It is an arithmetic number, because the mean of its divisors is an integer number (60269177).

Almost surely, 2^291625025 is an apocalyptic number.

291625025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

291625025 is a deficient number, since it is larger than the sum of its proper divisors (69990037).

291625025 is a wasteful number, since it uses less digits than its factorization.

291625025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11665011 (or 11665006 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 291625025 is about 17077.0320899154. The cubic root of 291625025 is about 663.1446389427.

The spelling of 291625025 in words is "two hundred ninety-one million, six hundred twenty-five thousand, twenty-five".