125540617 has 2 divisors, whose sum is σ = 125540618. Its totient is φ = 125540616.

The previous prime is 125540609. The next prime is 125540629. The reversal of 125540617 is 716045521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100380361 + 25160256 = 10019^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 125540617 - 2³ = 125540609 is a prime.

It is not a weakly prime, because it can be changed into another prime (125520617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62770308 + 62770309.

It is an arithmetic number, because the mean of its divisors is an integer number (62770309).

Almost surely, 2^125540617 is an apocalyptic number.

It is an amenable number.

125540617 is a deficient number, since it is larger than the sum of its proper divisors (1).

125540617 is an equidigital number, since it uses as much as digits as its factorization.

125540617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 125540617 is about 11204.4909299798. The cubic root of 125540617 is about 500.7197859857.

The spelling of 125540617 in words is "one hundred twenty-five million, five hundred forty thousand, six hundred seventeen".