25128937 has 2 divisors, whose sum is σ = 25128938. Its totient is φ = 25128936.

The previous prime is 25128931. The next prime is 25128947. The reversal of 25128937 is 73982152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24960016 + 168921 = 4996^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 25128937 - 2¹⁹ = 24604649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25128896 and 25128905.

It is not a weakly prime, because it can be changed into another prime (25128931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564468 + 12564469.

It is an arithmetic number, because the mean of its divisors is an integer number (12564469).

Almost surely, 2^25128937 is an apocalyptic number.

It is an amenable number.

25128937 is a deficient number, since it is larger than the sum of its proper divisors (1).

25128937 is an equidigital number, since it uses as much as digits as its factorization.

25128937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 25128937 is about 5012.8771179832. The cubic root of 25128937 is about 292.9035975258.

It can be divided in two parts, 2512 and 8937, that added together give a square (11449 = 107²).

The spelling of 25128937 in words is "twenty-five million, one hundred twenty-eight thousand, nine hundred thirty-seven".