125506261 has 2 divisors, whose sum is σ = 125506262. Its totient is φ = 125506260.

The previous prime is 125506247. The next prime is 125506301. The reversal of 125506261 is 162605521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97891236 + 27615025 = 9894^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 125506261 - 2⁷ = 125506133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125506211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62753130 + 62753131.

It is an arithmetic number, because the mean of its divisors is an integer number (62753131).

Almost surely, 2^125506261 is an apocalyptic number.

It is an amenable number.

125506261 is a deficient number, since it is larger than the sum of its proper divisors (1).

125506261 is an equidigital number, since it uses as much as digits as its factorization.

125506261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 125506261 is about 11202.9576898246. The cubic root of 125506261 is about 500.6741054220.

The spelling of 125506261 in words is "one hundred twenty-five million, five hundred six thousand, two hundred sixty-one".