25537129 has 2 divisors, whose sum is σ = 25537130. Its totient is φ = 25537128.

The previous prime is 25537123. The next prime is 25537133. The reversal of 25537129 is 92173552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22781529 + 2755600 = 4773^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 25537129 - 2¹⁷ = 25406057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25537094 and 25537103.

It is not a weakly prime, because it can be changed into another prime (25537123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12768564 + 12768565.

It is an arithmetic number, because the mean of its divisors is an integer number (12768565).

Almost surely, 2^25537129 is an apocalyptic number.

It is an amenable number.

25537129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25537129 is an equidigital number, since it uses as much as digits as its factorization.

25537129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 25537129 is about 5053.4274507506. The cubic root of 25537129 is about 294.4810525848.

The spelling of 25537129 in words is "twenty-five million, five hundred thirty-seven thousand, one hundred twenty-nine".