25072261 has 2 divisors, whose sum is σ = 25072262. Its totient is φ = 25072260.

The previous prime is 25072253. The next prime is 25072283. The reversal of 25072261 is 16227052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 6280036 = 4335^2 + 2506^2 .

It is a cyclic number.

It is not a de Polignac number, because 25072261 - 2³ = 25072253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25072661) 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, 12536130 + 12536131.

It is an arithmetic number, because the mean of its divisors is an integer number (12536131).

Almost surely, 2^25072261 is an apocalyptic number.

It is an amenable number.

25072261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25072261 is an equidigital number, since it uses as much as digits as its factorization.

25072261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 25072261 is about 5007.2208858807. The cubic root of 25072261 is about 292.6832260826.

The spelling of 25072261 in words is "twenty-five million, seventy-two thousand, two hundred sixty-one".