25619261 has 2 divisors, whose sum is σ = 25619262. Its totient is φ = 25619260.

The previous prime is 25619257. The next prime is 25619327. The reversal of 25619261 is 16291652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 11519236 = 3755^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 25619261 - 2² = 25619257 is a prime.

It is a super-2 number, since 2×25619261² = 1312693068372242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25619161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12809630 + 12809631.

It is an arithmetic number, because the mean of its divisors is an integer number (12809631).

Almost surely, 2^25619261 is an apocalyptic number.

It is an amenable number.

25619261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25619261 is an equidigital number, since it uses as much as digits as its factorization.

25619261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 25619261 is about 5061.5472930716. The cubic root of 25619261 is about 294.7964160811.

The spelling of 25619261 in words is "twenty-five million, six hundred nineteen thousand, two hundred sixty-one".