125571123 has 24 divisors (see below), whose sum is σ = 185908736. Its totient is φ = 81648000.

The previous prime is 125571119. The next prime is 125571143. The reversal of 125571123 is 321175521.

It is not a de Polignac number, because 125571123 - 2² = 125571119 is a prime.

It is a super-2 number, since 2×125571123² = 31536213862962258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125571113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68823 + ... + 70623.

Almost surely, 2^125571123 is an apocalyptic number.

125571123 is a deficient number, since it is larger than the sum of its proper divisors (60337613).

125571123 is a wasteful number, since it uses less digits than its factorization.

125571123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1992 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 125571123 is about 11205.8521764300. The cubic root of 125571123 is about 500.7603405119.

The spelling of 125571123 in words is "one hundred twenty-five million, five hundred seventy-one thousand, one hundred twenty-three".