25128377 has 2 divisors, whose sum is σ = 25128378. Its totient is φ = 25128376.

The previous prime is 25128373. The next prime is 25128421. The reversal of 25128377 is 77382152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16152361 + 8976016 = 4019^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 25128377 - 2² = 25128373 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25128373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564188 + 12564189.

It is an arithmetic number, because the mean of its divisors is an integer number (12564189).

Almost surely, 2^25128377 is an apocalyptic number.

It is an amenable number.

25128377 is a deficient number, since it is larger than the sum of its proper divisors (1).

25128377 is an equidigital number, since it uses as much as digits as its factorization.

25128377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 25128377 is about 5012.8212615253. The cubic root of 25128377 is about 292.9014217177.

The spelling of 25128377 in words is "twenty-five million, one hundred twenty-eight thousand, three hundred seventy-seven".