11421915 has 16 divisors (see below), whose sum is σ = 19070208. Its totient is φ = 5826656.

The previous prime is 11421913. The next prime is 11421947. The reversal of 11421915 is 51912411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11421915 - 2¹ = 11421913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11421913) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16209 + ... + 16898.

It is an arithmetic number, because the mean of its divisors is an integer number (1191888).

Almost surely, 2^11421915 is an apocalyptic number.

11421915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11421915 is a deficient number, since it is larger than the sum of its proper divisors (7648293).

11421915 is a wasteful number, since it uses less digits than its factorization.

11421915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33138.

The product of its digits is 360, while the sum is 24.

The square root of 11421915 is about 3379.6323764575. The cubic root of 11421915 is about 225.2058363291.

The spelling of 11421915 in words is "eleven million, four hundred twenty-one thousand, nine hundred fifteen".