25603261 has 2 divisors, whose sum is σ = 25603262. Its totient is φ = 25603260.

The previous prime is 25603243. The next prime is 25603273. The reversal of 25603261 is 16230652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17480761 + 8122500 = 4181^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 25603261 - 2⁷ = 25603133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25603211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12801630 + 12801631.

It is an arithmetic number, because the mean of its divisors is an integer number (12801631).

Almost surely, 2^25603261 is an apocalyptic number.

It is an amenable number.

25603261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25603261 is an equidigital number, since it uses as much as digits as its factorization.

25603261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25603261 is about 5059.9665018654. The cubic root of 25603261 is about 294.7350335544.

The spelling of 25603261 in words is "twenty-five million, six hundred three thousand, two hundred sixty-one".