25421161 has 2 divisors, whose sum is σ = 25421162. Its totient is φ = 25421160.

The previous prime is 25421129. The next prime is 25421237. The reversal of 25421161 is 16112452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16451136 + 8970025 = 4056^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 25421161 - 2⁵ = 25421129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25421111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710580 + 12710581.

It is an arithmetic number, because the mean of its divisors is an integer number (12710581).

Almost surely, 2^25421161 is an apocalyptic number.

It is an amenable number.

25421161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25421161 is an equidigital number, since it uses as much as digits as its factorization.

25421161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 25421161 is about 5041.9402019461. The cubic root of 25421161 is about 294.0346149874.

The spelling of 25421161 in words is "twenty-five million, four hundred twenty-one thousand, one hundred sixty-one".