120731000 has 128 divisors (see below), whose sum is σ = 313709760. Its totient is φ = 43200000.

The previous prime is 120730999. The next prime is 120731021. The reversal of 120731000 is 137021.

It is a super-2 number, since 2×120731000² = 29151948722000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480875 + ... + 481125.

Almost surely, 2^120731000 is an apocalyptic number.

120731000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120731000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156854880).

120731000 is an abundant number, since it is smaller than the sum of its proper divisors (192978760).

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

120731000 is a wasteful number, since it uses less digits than its factorization.

120731000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 120731000 is about 10987.7659239720. The cubic root of 120731000 is about 494.2419441313.

Adding to 120731000 its reverse (137021), we get a palindrome (120868021).

The spelling of 120731000 in words is "one hundred twenty million, seven hundred thirty-one thousand".