25628761 has 2 divisors, whose sum is σ = 25628762. Its totient is φ = 25628760.

The previous prime is 25628737. The next prime is 25628789. The reversal of 25628761 is 16782652.

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., 13097161 + 12531600 = 3619^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 25628761 - 2⁷ = 25628633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25628761.

It is not a weakly prime, because it can be changed into another prime (25628791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814380 + 12814381.

It is an arithmetic number, because the mean of its divisors is an integer number (12814381).

Almost surely, 2^25628761 is an apocalyptic number.

It is an amenable number.

25628761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25628761 is an equidigital number, since it uses as much as digits as its factorization.

25628761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 25628761 is about 5062.4856543007. The cubic root of 25628761 is about 294.8328498650.

The spelling of 25628761 in words is "twenty-five million, six hundred twenty-eight thousand, seven hundred sixty-one".