25401091 has 2 divisors, whose sum is σ = 25401092. Its totient is φ = 25401090.

The previous prime is 25401053. The next prime is 25401097. The reversal of 25401091 is 19010452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25401091 - 2²¹ = 23303939 is a prime.

It is not a weakly prime, because it can be changed into another prime (25401097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700545 + 12700546.

It is an arithmetic number, because the mean of its divisors is an integer number (12700546).

Almost surely, 2^25401091 is an apocalyptic number.

25401091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25401091 is an equidigital number, since it uses as much as digits as its factorization.

25401091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 25401091 is about 5039.9495037153. The cubic root of 25401091 is about 293.9572145306.

The spelling of 25401091 in words is "twenty-five million, four hundred one thousand, ninety-one".