125236972309249 has 2 divisors, whose sum is σ = 125236972309250. Its totient is φ = 125236972309248.

The previous prime is 125236972309247. The next prime is 125236972309259. The reversal of 125236972309249 is 942903279632521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109709179866225 + 15527792443024 = 10474215^2 + 3940532^2 .

It is a cyclic number.

It is not a de Polignac number, because 125236972309249 - 2¹ = 125236972309247 is a prime.

Together with 125236972309247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (125236972309247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62618486154624 + 62618486154625.

It is an arithmetic number, because the mean of its divisors is an integer number (62618486154625).

Almost surely, 2^{125236972309249} is an apocalyptic number.

It is an amenable number.

125236972309249 is a deficient number, since it is larger than the sum of its proper divisors (1).

125236972309249 is an equidigital number, since it uses as much as digits as its factorization.

125236972309249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88179840, while the sum is 64.

The spelling of 125236972309249 in words is "one hundred twenty-five trillion, two hundred thirty-six billion, nine hundred seventy-two million, three hundred nine thousand, two hundred forty-nine".