11920515 has 16 divisors (see below), whose sum is σ = 19117728. Its totient is φ = 6342656.

The previous prime is 11920511. The next prime is 11920529. The reversal of 11920515 is 51502911.

11920515 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11920515 - 2² = 11920511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11920511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9187 + ... + 10403.

It is an arithmetic number, because the mean of its divisors is an integer number (1194858).

Almost surely, 2^11920515 is an apocalyptic number.

11920515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11920515 is a deficient number, since it is larger than the sum of its proper divisors (7197213).

11920515 is a wasteful number, since it uses less digits than its factorization.

11920515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 11920515 is about 3452.6098823933. The cubic root of 11920515 is about 228.4362415819.

The spelling of 11920515 in words is "eleven million, nine hundred twenty thousand, five hundred fifteen".