11921145 has 8 divisors (see below), whose sum is σ = 19073856. Its totient is φ = 6357936.

The previous prime is 11921137. The next prime is 11921177. The reversal of 11921145 is 54112911.

It is a happy number.

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

It is not a de Polignac number, because 11921145 - 2³ = 11921137 is a prime.

It is a super-2 number, since 2×11921145² = 284227396222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397357 + ... + 397386.

It is an arithmetic number, because the mean of its divisors is an integer number (2384232).

Almost surely, 2^11921145 is an apocalyptic number.

11921145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11921145 is a deficient number, since it is larger than the sum of its proper divisors (7152711).

11921145 is an equidigital number, since it uses as much as digits as its factorization.

11921145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794751.

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

The square root of 11921145 is about 3452.7011165173. The cubic root of 11921145 is about 228.4402658012.

The spelling of 11921145 in words is "eleven million, nine hundred twenty-one thousand, one hundred forty-five".