120660015 has 32 divisors (see below), whose sum is σ = 224386560. Its totient is φ = 54221184.

The previous prime is 120659993. The next prime is 120660017. The reversal of 120660015 is 510066021.

It is a happy number.

It is not a de Polignac number, because 120660015 - 2⁵ = 120659983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 120659973 and 120660000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120660017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3544 + ... + 15933.

It is an arithmetic number, because the mean of its divisors is an integer number (7012080).

Almost surely, 2^120660015 is an apocalyptic number.

120660015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120660015 is a deficient number, since it is larger than the sum of its proper divisors (103726545).

120660015 is a wasteful number, since it uses less digits than its factorization.

120660015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19551.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 120660015 is about 10984.5352655449. The cubic root of 120660015 is about 494.1450603080.

The spelling of 120660015 in words is "one hundred twenty million, six hundred sixty thousand, fifteen".