11438921 has 4 divisors (see below), whose sum is σ = 12318852. Its totient is φ = 10558992.

The previous prime is 11438899. The next prime is 11438923. The reversal of 11438921 is 12983411.

11438921 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5382400 + 6056521 = 2320^2 + 2461^2 .

It is a cyclic number.

It is not a de Polignac number, because 11438921 - 2⁶ = 11438857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11438923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439946 + ... + 439971.

It is an arithmetic number, because the mean of its divisors is an integer number (3079713).

Almost surely, 2^11438921 is an apocalyptic number.

It is an amenable number.

11438921 is a deficient number, since it is larger than the sum of its proper divisors (879931).

11438921 is an equidigital number, since it uses as much as digits as its factorization.

11438921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879930.

The product of its digits is 1728, while the sum is 29.

The square root of 11438921 is about 3382.1473947775. The cubic root of 11438921 is about 225.3175499742.

The spelling of 11438921 in words is "eleven million, four hundred thirty-eight thousand, nine hundred twenty-one".