120831000 has 64 divisors (see below), whose sum is σ = 377002080. Its totient is φ = 32220800.

The previous prime is 120830999. The next prime is 120831037. The reversal of 120831000 is 138021.

It is a happy number.

It is a super-2 number, since 2×120831000² = 29200261122000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17139 + ... + 23138.

Almost surely, 2^120831000 is an apocalyptic number.

120831000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120831000 is an abundant number, since it is smaller than the sum of its proper divisors (256171080).

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

120831000 is a wasteful number, since it uses less digits than its factorization.

120831000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40301 (or 40287 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 120831000 is about 10992.3154976556. The cubic root of 120831000 is about 494.3783646443.

Adding to 120831000 its reverse (138021), we get a palindrome (120969021).

The spelling of 120831000 in words is "one hundred twenty million, eight hundred thirty-one thousand".