240120015 has 12 divisors (see below), whose sum is σ = 384288072. Its totient is φ = 128032000.

The previous prime is 240119989. The next prime is 240120031. The reversal of 240120015 is 510021042.

It is not a de Polignac number, because 240120015 - 2¹⁵ = 240087247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 240119976 and 240120003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58015 + ... + 62015.

It is an arithmetic number, because the mean of its divisors is an integer number (32024006).

Almost surely, 2^240120015 is an apocalyptic number.

240120015 is a deficient number, since it is larger than the sum of its proper divisors (144168057).

240120015 is an frugal number, since it uses more digits than its factorization.

240120015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8010 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 240120015 is about 15495.8063681759. The cubic root of 240120015 is about 621.5500712925.

Multiplying 240120015 by its sum of digits (15), we get a square (3601800225 = 60015²).

240120015 divided by its sum of digits (15) gives a square (16008001 = 4001²).

Adding to 240120015 its reverse (510021042), we get a palindrome (750141057).

The spelling of 240120015 in words is "two hundred forty million, one hundred twenty thousand, fifteen".