25212637 has 2 divisors, whose sum is σ = 25212638. Its totient is φ = 25212636.

The previous prime is 25212631. The next prime is 25212643. The reversal of 25212637 is 73621252.

It is a balanced prime because it is at equal distance from previous prime (25212631) and next prime (25212643).

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 1602756 = 4859^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 25212637 - 2²³ = 16824029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25212631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606318 + 12606319.

It is an arithmetic number, because the mean of its divisors is an integer number (12606319).

Almost surely, 2^25212637 is an apocalyptic number.

It is an amenable number.

25212637 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212637 is an equidigital number, since it uses as much as digits as its factorization.

25212637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 25212637 is about 5021.2186767756. The cubic root of 25212637 is about 293.2284403137.

Adding to 25212637 its reverse (73621252), we get a palindrome (98833889).

The spelling of 25212637 in words is "twenty-five million, two hundred twelve thousand, six hundred thirty-seven".