25680401 has 2 divisors, whose sum is σ = 25680402. Its totient is φ = 25680400.

The previous prime is 25680379. The next prime is 25680407. The reversal of 25680401 is 10408652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17007376 + 8673025 = 4124^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 25680401 - 2⁶ = 25680337 is a prime.

It is a super-3 number, since 3×25680401³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25680407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840200 + 12840201.

It is an arithmetic number, because the mean of its divisors is an integer number (12840201).

Almost surely, 2^25680401 is an apocalyptic number.

It is an amenable number.

25680401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25680401 is an equidigital number, since it uses as much as digits as its factorization.

25680401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25680401 is about 5067.5833490925. The cubic root of 25680401 is about 295.0307389208.

The spelling of 25680401 in words is "twenty-five million, six hundred eighty thousand, four hundred one".