125661711 has 16 divisors (see below), whose sum is σ = 191679488. Its totient is φ = 71733600.

The previous prime is 125661709. The next prime is 125661737. The reversal of 125661711 is 117166521.

It is not a de Polignac number, because 125661711 - 2¹ = 125661709 is a prime.

It is a super-2 number, since 2×125661711² = 31581731222895042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125661791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23421 + ... + 28281.

It is an arithmetic number, because the mean of its divisors is an integer number (11979968).

Almost surely, 2^125661711 is an apocalyptic number.

125661711 is a deficient number, since it is larger than the sum of its proper divisors (66017777).

125661711 is a wasteful number, since it uses less digits than its factorization.

125661711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102.

The product of its digits is 2520, while the sum is 30.

The square root of 125661711 is about 11209.8934428477. The cubic root of 125661711 is about 500.8807290551.

The spelling of 125661711 in words is "one hundred twenty-five million, six hundred sixty-one thousand, seven hundred eleven".