25128451 has 2 divisors, whose sum is σ = 25128452. Its totient is φ = 25128450.

The previous prime is 25128437. The next prime is 25128461. The reversal of 25128451 is 15482152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25128451 - 2¹⁵ = 25095683 is a prime.

It is not a weakly prime, because it can be changed into another prime (25128421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564225 + 12564226.

It is an arithmetic number, because the mean of its divisors is an integer number (12564226).

Almost surely, 2^25128451 is an apocalyptic number.

25128451 is a deficient number, since it is larger than the sum of its proper divisors (1).

25128451 is an equidigital number, since it uses as much as digits as its factorization.

25128451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 28.

The square root of 25128451 is about 5012.8286425929. The cubic root of 25128451 is about 292.9017092370.

The spelling of 25128451 in words is "twenty-five million, one hundred twenty-eight thousand, four hundred fifty-one".