13421345 has 24 divisors (see below), whose sum is σ = 19391400. Its totient is φ = 8881152.

The previous prime is 13421329. The next prime is 13421363. The reversal of 13421345 is 54312431.

It can be written as a sum of positive squares in 4 ways, for example, as 1366561 + 12054784 = 1169^2 + 3472^2 .

It is not a de Polignac number, because 13421345 - 2⁴ = 13421329 is a prime.

It is a super-3 number, since 3×13421345³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13421345.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6161 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (807975).

Almost surely, 2^13421345 is an apocalyptic number.

It is an amenable number.

13421345 is a deficient number, since it is larger than the sum of its proper divisors (5970055).

13421345 is a wasteful number, since it uses less digits than its factorization.

13421345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937 (or 1930 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 13421345 is about 3663.5153882576. The cubic root of 13421345 is about 237.6468233420.

Adding to 13421345 its reverse (54312431), we get a palindrome (67733776).

The spelling of 13421345 in words is "thirteen million, four hundred twenty-one thousand, three hundred forty-five".