120987900 has 216 divisors, whose sum is σ = 421254288. Its totient is φ = 29040000.

The previous prime is 120987859. The next prime is 120987901. The reversal of 120987900 is 9789021.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120987901) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1197850 + ... + 1197950.

Almost surely, 2^120987900 is an apocalyptic number.

120987900 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 120987900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210627144).

120987900 is an abundant number, since it is smaller than the sum of its proper divisors (300266388).

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

120987900 is a wasteful number, since it uses less digits than its factorization.

120987900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 120987900 is about 10999.4499862493. The cubic root of 120987900 is about 494.5922568171.

The spelling of 120987900 in words is "one hundred twenty million, nine hundred eighty-seven thousand, nine hundred".