25656601 has 2 divisors, whose sum is σ = 25656602. Its totient is φ = 25656600.

The previous prime is 25656581. The next prime is 25656629. The reversal of 25656601 is 10665652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25240576 + 416025 = 5024^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 25656601 - 2¹³ = 25648409 is a prime.

It is a super-2 number, since 2×25656601² = 1316522349746402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25656671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828300 + 12828301.

It is an arithmetic number, because the mean of its divisors is an integer number (12828301).

Almost surely, 2^25656601 is an apocalyptic number.

It is an amenable number.

25656601 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656601 is an equidigital number, since it uses as much as digits as its factorization.

25656601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25656601 is about 5065.2345454085. The cubic root of 25656601 is about 294.9395682015.

The spelling of 25656601 in words is "twenty-five million, six hundred fifty-six thousand, six hundred one".