120995550 has 216 divisors, whose sum is σ = 369924984. Its totient is φ = 28304640.

The previous prime is 120995543. The next prime is 120995557. The reversal of 120995550 is 55599021.

120995550 is a `hidden beast` number, since 12 + 0 + 9 + 95 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (120995543) and next prime (120995557).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120995557) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2813829 + ... + 2813871.

Almost surely, 2^120995550 is an apocalyptic number.

120995550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 120995550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184962492).

120995550 is an abundant number, since it is smaller than the sum of its proper divisors (248929434).

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

120995550 is a wasteful number, since it uses less digits than its factorization.

120995550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 120995550 is about 10999.7977254130. The cubic root of 120995550 is about 494.6026808651.

The spelling of 120995550 in words is "one hundred twenty million, nine hundred ninety-five thousand, five hundred fifty".