125681911 has 8 divisors (see below), whose sum is σ = 130507200. Its totient is φ = 120889440.

The previous prime is 125681909. The next prime is 125681917. The reversal of 125681911 is 119186521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125681911 - 2¹ = 125681909 is a prime.

It is a super-2 number, since 2×125681911² = 31591885505223842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125681917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 15856.

It is an arithmetic number, because the mean of its divisors is an integer number (16313400).

Almost surely, 2^125681911 is an apocalyptic number.

125681911 is a deficient number, since it is larger than the sum of its proper divisors (4825289).

125681911 is a wasteful number, since it uses less digits than its factorization.

125681911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16409.

The product of its digits is 4320, while the sum is 34.

The square root of 125681911 is about 11210.7943964734. The cubic root of 125681911 is about 500.9075663167.

The spelling of 125681911 in words is "one hundred twenty-five million, six hundred eighty-one thousand, nine hundred eleven".