25128553 has 2 divisors, whose sum is σ = 25128554. Its totient is φ = 25128552.

The previous prime is 25128547. The next prime is 25128577. The reversal of 25128553 is 35582152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22781529 + 2347024 = 4773^2 + 1532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25128553 is a prime.

It is not a weakly prime, because it can be changed into another prime (25128853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564276 + 12564277.

It is an arithmetic number, because the mean of its divisors is an integer number (12564277).

Almost surely, 2^25128553 is an apocalyptic number.

It is an amenable number.

25128553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25128553 is an equidigital number, since it uses as much as digits as its factorization.

25128553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 25128553 is about 5012.8388164791. The cubic root of 25128553 is about 292.9021055465.

The spelling of 25128553 in words is "twenty-five million, one hundred twenty-eight thousand, five hundred fifty-three".