125122780 has 12 divisors (see below), whose sum is σ = 262757880. Its totient is φ = 50049104.

The previous prime is 125122729. The next prime is 125122801. The reversal of 125122780 is 87221521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128050 + ... + 3128089.

It is an arithmetic number, because the mean of its divisors is an integer number (21896490).

Almost surely, 2^125122780 is an apocalyptic number.

125122780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125122780 is an abundant number, since it is smaller than the sum of its proper divisors (137635100).

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

125122780 is a wasteful number, since it uses less digits than its factorization.

125122780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6256148 (or 6256146 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 125122780 is about 11185.8294283437. The cubic root of 125122780 is about 500.1636530962.

The spelling of 125122780 in words is "one hundred twenty-five million, one hundred twenty-two thousand, seven hundred eighty".