125012501 has 2 divisors, whose sum is σ = 125012502. Its totient is φ = 125012500.

The previous prime is 125012497. The next prime is 125012507. The reversal of 125012501 is 105210521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96550276 + 28462225 = 9826^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 125012501 - 2² = 125012497 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125012501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125012507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62506250 + 62506251.

It is an arithmetic number, because the mean of its divisors is an integer number (62506251).

Almost surely, 2^125012501 is an apocalyptic number.

It is an amenable number.

125012501 is a deficient number, since it is larger than the sum of its proper divisors (1).

125012501 is an equidigital number, since it uses as much as digits as its factorization.

125012501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 125012501 is about 11180.8989352377. The cubic root of 125012501 is about 500.0166674444.

The spelling of 125012501 in words is "one hundred twenty-five million, twelve thousand, five hundred one".