25906261 has 2 divisors, whose sum is σ = 25906262. Its totient is φ = 25906260.

The previous prime is 25906229. The next prime is 25906319. The reversal of 25906261 is 16260952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16966161 + 8940100 = 4119^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 25906261 - 2⁵ = 25906229 is a prime.

It is a super-2 number, since 2×25906261² = 1342268718000242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25906061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953130 + 12953131.

It is an arithmetic number, because the mean of its divisors is an integer number (12953131).

Almost surely, 2^25906261 is an apocalyptic number.

It is an amenable number.

25906261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25906261 is an equidigital number, since it uses as much as digits as its factorization.

25906261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 25906261 is about 5089.8193484641. The cubic root of 25906261 is about 295.8931506541.

The spelling of 25906261 in words is "twenty-five million, nine hundred six thousand, two hundred sixty-one".