11921090 has 8 divisors (see below), whose sum is σ = 21457980. Its totient is φ = 4768432.

The previous prime is 11921089. The next prime is 11921101. The reversal of 11921090 is 9012911.

It can be written as a sum of positive squares in 2 ways, for example, as 11404129 + 516961 = 3377^2 + 719^2 .

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

It is a super-2 number, since 2×11921090² = 284224773576200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 596045 + ... + 596064.

Almost surely, 2^11921090 is an apocalyptic number.

11921090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11921090 is a deficient number, since it is larger than the sum of its proper divisors (9536890).

11921090 is a wasteful number, since it uses less digits than its factorization.

11921090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192116.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 11921090 is about 3452.6931517295. The cubic root of 11921090 is about 228.4399144861.

The spelling of 11921090 in words is "eleven million, nine hundred twenty-one thousand, ninety".