120155399 has 24 divisors (see below), whose sum is σ = 153407520. Its totient is φ = 93248064.

The previous prime is 120155393. The next prime is 120155407. The reversal of 120155399 is 993551021.

It is not a de Polignac number, because 120155399 - 2⁴ = 120155383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120155393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31982 + ... + 35540.

It is an arithmetic number, because the mean of its divisors is an integer number (6391980).

Almost surely, 2^120155399 is an apocalyptic number.

120155399 is a deficient number, since it is larger than the sum of its proper divisors (33252121).

120155399 is a wasteful number, since it uses less digits than its factorization.

120155399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639 (or 3632 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 120155399 is about 10961.5418167336. The cubic root of 120155399 is about 493.4552379634.

The spelling of 120155399 in words is "one hundred twenty million, one hundred fifty-five thousand, three hundred ninety-nine".