25125491 has 2 divisors, whose sum is σ = 25125492. Its totient is φ = 25125490.

The previous prime is 25125461. The next prime is 25125523. The reversal of 25125491 is 19452152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25125491 - 2⁶ = 25125427 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25125461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12562745 + 12562746.

It is an arithmetic number, because the mean of its divisors is an integer number (12562746).

Almost surely, 2^25125491 is an apocalyptic number.

25125491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25125491 is an equidigital number, since it uses as much as digits as its factorization.

25125491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 25125491 is about 5012.5333914100. The cubic root of 25125491 is about 292.8902080227.

The spelling of 25125491 in words is "twenty-five million, one hundred twenty-five thousand, four hundred ninety-one".