13451421 has 4 divisors (see below), whose sum is σ = 17935232. Its totient is φ = 8967612.

The previous prime is 13451419. The next prime is 13451429. The reversal of 13451421 is 12415431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13451421 - 2¹ = 13451419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13451429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241901 + ... + 2241906.

It is an arithmetic number, because the mean of its divisors is an integer number (4483808).

Almost surely, 2^13451421 is an apocalyptic number.

It is an amenable number.

13451421 is a deficient number, since it is larger than the sum of its proper divisors (4483811).

13451421 is an equidigital number, since it uses as much as digits as its factorization.

13451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483810.

The product of its digits is 480, while the sum is 21.

The square root of 13451421 is about 3667.6178917657. The cubic root of 13451421 is about 237.8242058015.

Adding to 13451421 its reverse (12415431), we get a palindrome (25866852).

The spelling of 13451421 in words is "thirteen million, four hundred fifty-one thousand, four hundred twenty-one".