125771617 has 4 divisors (see below), whose sum is σ = 126689796. Its totient is φ = 124853440.

The previous prime is 125771587. The next prime is 125771647. The reversal of 125771617 is 716177521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (125771587) and next prime (125771647).

It can be written as a sum of positive squares in 2 ways, for example, as 66650896 + 59120721 = 8164^2 + 7689^2 .

It is a cyclic number.

It is not a de Polignac number, because 125771617 - 2⁷ = 125771489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125771647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458884 + ... + 459157.

It is an arithmetic number, because the mean of its divisors is an integer number (31672449).

Almost surely, 2^125771617 is an apocalyptic number.

It is an amenable number.

125771617 is a deficient number, since it is larger than the sum of its proper divisors (918179).

125771617 is an equidigital number, since it uses as much as digits as its factorization.

125771617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918178.

The product of its digits is 20580, while the sum is 37.

The square root of 125771617 is about 11214.7945589743. The cubic root of 125771617 is about 501.0267129447.

The spelling of 125771617 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, six hundred seventeen".