25658641 has 2 divisors, whose sum is σ = 25658642. Its totient is φ = 25658640.

The previous prime is 25658629. The next prime is 25658651. The reversal of 25658641 is 14685652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 4498641 = 4600^2 + 2121^2 .

It is a cyclic number.

It is not a de Polignac number, because 25658641 - 2⁵ = 25658609 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25658641.

It is not a weakly prime, because it can be changed into another prime (25658621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12829320 + 12829321.

It is an arithmetic number, because the mean of its divisors is an integer number (12829321).

Almost surely, 2^25658641 is an apocalyptic number.

It is an amenable number.

25658641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25658641 is an equidigital number, since it uses as much as digits as its factorization.

25658641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 25658641 is about 5065.4359141144. The cubic root of 25658641 is about 294.9473850433.

The spelling of 25658641 in words is "twenty-five million, six hundred fifty-eight thousand, six hundred forty-one".