120861599 has 4 divisors (see below), whose sum is σ = 120955800. Its totient is φ = 120767400.

The previous prime is 120861593. The next prime is 120861613. The reversal of 120861599 is 995168021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120861599 is a prime.

It is a super-2 number, since 2×120861599² = 29215052225673602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120861593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45149 + ... + 47750.

It is an arithmetic number, because the mean of its divisors is an integer number (30238950).

Almost surely, 2^120861599 is an apocalyptic number.

120861599 is a deficient number, since it is larger than the sum of its proper divisors (94201).

120861599 is an equidigital number, since it uses as much as digits as its factorization.

120861599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94200.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 120861599 is about 10993.7072455110. The cubic root of 120861599 is about 494.4200929171.

The spelling of 120861599 in words is "one hundred twenty million, eight hundred sixty-one thousand, five hundred ninety-nine".