11921290 has 32 divisors (see below), whose sum is σ = 22208256. Its totient is φ = 4605120.

The previous prime is 11921269. The next prime is 11921297. The reversal of 11921290 is 9212911.

It is not an unprimeable number, because it can be changed into a prime (11921297) 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, 43855 + ... + 44125.

It is an arithmetic number, because the mean of its divisors is an integer number (694008).

Almost surely, 2^11921290 is an apocalyptic number.

11921290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11921290 is a deficient number, since it is larger than the sum of its proper divisors (10286966).

11921290 is a wasteful number, since it uses less digits than its factorization.

11921290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11921290 is about 3452.7221145062. The cubic root of 11921290 is about 228.4411919903.

It can be divided in two parts, 1 and 1921290, that added together give a palindrome (1921291).

The spelling of 11921290 in words is "eleven million, nine hundred twenty-one thousand, two hundred ninety".