25419161 has 2 divisors, whose sum is σ = 25419162. Its totient is φ = 25419160.

The previous prime is 25419143. The next prime is 25419181. The reversal of 25419161 is 16191452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 7946761 = 4180^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 25419161 - 2¹⁰ = 25418137 is a prime.

It is a super-2 number, since 2×25419161² = 1292267491887842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25419181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12709580 + 12709581.

It is an arithmetic number, because the mean of its divisors is an integer number (12709581).

Almost surely, 2^25419161 is an apocalyptic number.

It is an amenable number.

25419161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25419161 is an equidigital number, since it uses as much as digits as its factorization.

25419161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 25419161 is about 5041.7418616982. The cubic root of 25419161 is about 294.0269037653.

The spelling of 25419161 in words is "twenty-five million, four hundred nineteen thousand, one hundred sixty-one".