25858537 has 2 divisors, whose sum is σ = 25858538. Its totient is φ = 25858536.

The previous prime is 25858531. The next prime is 25858561. The reversal of 25858537 is 73585852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24019801 + 1838736 = 4901^2 + 1356^2 .

It is a cyclic number.

It is not a de Polignac number, because 25858537 - 2³ = 25858529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25858493 and 25858502.

It is not a weakly prime, because it can be changed into another prime (25858531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12929268 + 12929269.

It is an arithmetic number, because the mean of its divisors is an integer number (12929269).

Almost surely, 2^25858537 is an apocalyptic number.

It is an amenable number.

25858537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25858537 is an equidigital number, since it uses as much as digits as its factorization.

25858537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 43.

The square root of 25858537 is about 5085.1290052466. The cubic root of 25858537 is about 295.7113428036.

The spelling of 25858537 in words is "twenty-five million, eight hundred fifty-eight thousand, five hundred thirty-seven".