125501264209 has 2 divisors, whose sum is σ = 125501264210. Its totient is φ = 125501264208.

The previous prime is 125501264191. The next prime is 125501264221. The reversal of 125501264209 is 902462105521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69552457984 + 55948806225 = 263728^2 + 236535^2 .

It is a cyclic number.

It is not a de Polignac number, because 125501264209 - 2¹⁵ = 125501231441 is a prime.

It is not a weakly prime, because it can be changed into another prime (125501264309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62750632104 + 62750632105.

It is an arithmetic number, because the mean of its divisors is an integer number (62750632105).

Almost surely, 2^125501264209 is an apocalyptic number.

It is an amenable number.

125501264209 is a deficient number, since it is larger than the sum of its proper divisors (1).

125501264209 is an equidigital number, since it uses as much as digits as its factorization.

125501264209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 125501264209 in words is "one hundred twenty-five billion, five hundred one million, two hundred sixty-four thousand, two hundred nine".