125742780 has 72 divisors (see below), whose sum is σ = 395561712. Its totient is φ = 33530112.

The previous prime is 125742733. The next prime is 125742797. The reversal of 125742780 is 87247521.

125742780 is a `hidden beast` number, since 1 + 2 + 574 + 2 + 7 + 80 = 666.

It is a super-2 number, since 2×125742780² = 31622493444256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8077 + ... + 17796.

Almost surely, 2^125742780 is an apocalyptic number.

125742780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125742780 is an abundant number, since it is smaller than the sum of its proper divisors (269818932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125742780 is a wasteful number, since it uses less digits than its factorization.

125742780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25897 (or 25883 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 125742780 is about 11213.5088174933. The cubic root of 125742780 is about 500.9884181051.

The spelling of 125742780 in words is "one hundred twenty-five million, seven hundred forty-two thousand, seven hundred eighty".