25158401 has 2 divisors, whose sum is σ = 25158402. Its totient is φ = 25158400.

The previous prime is 25158377. The next prime is 25158403. The reversal of 25158401 is 10485152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17007376 + 8151025 = 4124^2 + 2855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25158401 is a prime.

Together with 25158403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25158403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12579200 + 12579201.

It is an arithmetic number, because the mean of its divisors is an integer number (12579201).

Almost surely, 2^25158401 is an apocalyptic number.

It is an amenable number.

25158401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25158401 is an equidigital number, since it uses as much as digits as its factorization.

25158401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 25158401 is about 5015.8150882982. The cubic root of 25158401 is about 293.0180305507.

The spelling of 25158401 in words is "twenty-five million, one hundred fifty-eight thousand, four hundred one".