120605509 has 4 divisors (see below), whose sum is σ = 120685216. Its totient is φ = 120525804.

The previous prime is 120605501. The next prime is 120605609. The reversal of 120605509 is 905506021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120605509 - 2³ = 120605501 is a prime.

It is a super-2 number, since 2×120605509² = 29091377602298162, 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 (120605501) 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, 37539 + ... + 40624.

It is an arithmetic number, because the mean of its divisors is an integer number (30171304).

Almost surely, 2^120605509 is an apocalyptic number.

It is an amenable number.

120605509 is a deficient number, since it is larger than the sum of its proper divisors (79707).

120605509 is an equidigital number, since it uses as much as digits as its factorization.

120605509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79706.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 120605509 is about 10982.0539517888. The cubic root of 120605509 is about 494.0706420419.

The spelling of 120605509 in words is "one hundred twenty million, six hundred five thousand, five hundred nine".