11421919 has 6 divisors (see below), whose sum is σ = 11809824. Its totient is φ = 11035260.

The previous prime is 11421913. The next prime is 11421947. The reversal of 11421919 is 91912411.

It is not a de Polignac number, because 11421919 - 2⁵ = 11421887 is a prime.

It is a super-2 number, since 2×11421919² = 260920467285122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18514 + ... + 19120.

It is an arithmetic number, because the mean of its divisors is an integer number (1968304).

Almost surely, 2^11421919 is an apocalyptic number.

11421919 is a deficient number, since it is larger than the sum of its proper divisors (387905).

11421919 is an frugal number, since it uses more digits than its factorization.

11421919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 638 counting only the distinct ones).

The product of its digits is 648, while the sum is 28.

The square root of 11421919 is about 3379.6329682378. The cubic root of 11421919 is about 225.2058626184.

The spelling of 11421919 in words is "eleven million, four hundred twenty-one thousand, nine hundred nineteen".