11940815 has 4 divisors (see below), whose sum is σ = 14328984. Its totient is φ = 9552648.

The previous prime is 11940793. The next prime is 11940821. The reversal of 11940815 is 51804911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51804911 = 2207 ⋅23473.

It is a cyclic number.

It is not a de Polignac number, because 11940815 - 2¹⁰ = 11939791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194077 + ... + 1194086.

It is an arithmetic number, because the mean of its divisors is an integer number (3582246).

Almost surely, 2^11940815 is an apocalyptic number.

11940815 is a deficient number, since it is larger than the sum of its proper divisors (2388169).

11940815 is an equidigital number, since it uses as much as digits as its factorization.

11940815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388168.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 11940815 is about 3455.5484369344. The cubic root of 11940815 is about 228.5658396141.

The spelling of 11940815 in words is "eleven million, nine hundred forty thousand, eight hundred fifteen".