13421407 has 2 divisors, whose sum is σ = 13421408. Its totient is φ = 13421406.

The previous prime is 13421399. The next prime is 13421411. The reversal of 13421407 is 70412431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13421407 - 2³ = 13421399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13421437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710703 + 6710704.

It is an arithmetic number, because the mean of its divisors is an integer number (6710704).

Almost surely, 2^13421407 is an apocalyptic number.

13421407 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421407 is an equidigital number, since it uses as much as digits as its factorization.

13421407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 13421407 is about 3663.5238500657. The cubic root of 13421407 is about 237.6471892785.

Adding to 13421407 its reverse (70412431), we get a palindrome (83833838).

The spelling of 13421407 in words is "thirteen million, four hundred twenty-one thousand, four hundred seven".