13421569 has 4 divisors (see below), whose sum is σ = 15338944. Its totient is φ = 11504196.

The previous prime is 13421567. The next prime is 13421579. The reversal of 13421569 is 96512431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96512431 = 61 ⋅1582171.

It is a cyclic number.

It is not a de Polignac number, because 13421569 - 2¹ = 13421567 is a prime.

It is a super-2 number, since 2×13421569² = 360277028843522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13421569.

It is not an unprimeable number, because it can be changed into a prime (13421563) 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, 958677 + ... + 958690.

It is an arithmetic number, because the mean of its divisors is an integer number (3834736).

Almost surely, 2^13421569 is an apocalyptic number.

It is an amenable number.

13421569 is a deficient number, since it is larger than the sum of its proper divisors (1917375).

13421569 is an equidigital number, since it uses as much as digits as its factorization.

13421569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917374.

The product of its digits is 6480, while the sum is 31.

The square root of 13421569 is about 3663.5459598591. The cubic root of 13421569 is about 237.6481454299.

The spelling of 13421569 in words is "thirteen million, four hundred twenty-one thousand, five hundred sixty-nine".