11720915 has 8 divisors (see below), whose sum is σ = 14676768. Its totient is φ = 8968960.

The previous prime is 11720903. The next prime is 11720977. The reversal of 11720915 is 51902711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11720915 - 2⁴ = 11720899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50846 + ... + 51075.

It is an arithmetic number, because the mean of its divisors is an integer number (1834596).

Almost surely, 2^11720915 is an apocalyptic number.

11720915 is a deficient number, since it is larger than the sum of its proper divisors (2955853).

11720915 is a wasteful number, since it uses less digits than its factorization.

11720915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101949.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 11720915 is about 3423.5821882934. The cubic root of 11720915 is about 227.1540610332.

The spelling of 11720915 in words is "eleven million, seven hundred twenty thousand, nine hundred fifteen".