25420237 has 2 divisors, whose sum is σ = 25420238. Its totient is φ = 25420236.

The previous prime is 25420229. The next prime is 25420277. The reversal of 25420237 is 73202452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19412836 + 6007401 = 4406^2 + 2451^2 .

It is a cyclic number.

It is not a de Polignac number, because 25420237 - 2³ = 25420229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25420277) 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, 12710118 + 12710119.

It is an arithmetic number, because the mean of its divisors is an integer number (12710119).

Almost surely, 2^25420237 is an apocalyptic number.

It is an amenable number.

25420237 is a deficient number, since it is larger than the sum of its proper divisors (1).

25420237 is an equidigital number, since it uses as much as digits as its factorization.

25420237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 25420237 is about 5041.8485697212. The cubic root of 25420237 is about 294.0310524531.

Adding to 25420237 its reverse (73202452), we get a palindrome (98622689).

The spelling of 25420237 in words is "twenty-five million, four hundred twenty thousand, two hundred thirty-seven".