125642770 has 24 divisors (see below), whose sum is σ = 248588172. Its totient is φ = 45687840.

The previous prime is 125642743. The next prime is 125642771. The reversal of 125642770 is 77246521.

It can be written as a sum of positive squares in 2 ways, for example, as 125641681 + 1089 = 11209^2 + 33^2 .

It is a super-2 number, since 2×125642770² = 31572211306545800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125642771) 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 11 ways as a sum of consecutive naturals, for example, 50709 + ... + 53128.

Almost surely, 2^125642770 is an apocalyptic number.

125642770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125642770 is a deficient number, since it is larger than the sum of its proper divisors (122945402).

125642770 is a wasteful number, since it uses less digits than its factorization.

125642770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103866 (or 103855 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 125642770 is about 11209.0485769311. The cubic root of 125642770 is about 500.8555618595.

The spelling of 125642770 in words is "one hundred twenty-five million, six hundred forty-two thousand, seven hundred seventy".