11420421 has 8 divisors (see below), whose sum is σ = 15441984. Its totient is φ = 7506240.

The previous prime is 11420417. The next prime is 11420429. The reversal of 11420421 is 12402411.

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

It is not a de Polignac number, because 11420421 - 2² = 11420417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11420421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11420429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26596 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (1930248).

Almost surely, 2^11420421 is an apocalyptic number.

It is an amenable number.

11420421 is a deficient number, since it is larger than the sum of its proper divisors (4021563).

11420421 is an equidigital number, since it uses as much as digits as its factorization.

11420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53691.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 11420421 is about 3379.4113392720. The cubic root of 11420421 is about 225.1960168376.

Adding to 11420421 its reverse (12402411), we get a palindrome (23822832).

The spelling of 11420421 in words is "eleven million, four hundred twenty thousand, four hundred twenty-one".