25423537 has 2 divisors, whose sum is σ = 25423538. Its totient is φ = 25423536.

The previous prime is 25423529. The next prime is 25423571. The reversal of 25423537 is 73532452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 8785296 = 4079^2 + 2964^2 .

It is a cyclic number.

It is not a de Polignac number, because 25423537 - 2³ = 25423529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25423499 and 25423508.

It is not a weakly prime, because it can be changed into another prime (25423507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12711768 + 12711769.

It is an arithmetic number, because the mean of its divisors is an integer number (12711769).

Almost surely, 2^25423537 is an apocalyptic number.

It is an amenable number.

25423537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25423537 is an equidigital number, since it uses as much as digits as its factorization.

25423537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 31.

The square root of 25423537 is about 5042.1758200206. The cubic root of 25423537 is about 294.0437753936.

Adding to 25423537 its reverse (73532452), we get a palindrome (98955989).

The spelling of 25423537 in words is "twenty-five million, four hundred twenty-three thousand, five hundred thirty-seven".