13421553 has 8 divisors (see below), whose sum is σ = 17913600. Its totient is φ = 8938608.

The previous prime is 13421539. The next prime is 13421563. The reversal of 13421553 is 35512431.

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

It is not a de Polignac number, because 13421553 - 2⁴ = 13421537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13421533) 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, 2763 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (2239200).

Almost surely, 2^13421553 is an apocalyptic number.

It is an amenable number.

13421553 is a deficient number, since it is larger than the sum of its proper divisors (4492047).

13421553 is a wasteful number, since it uses less digits than its factorization.

13421553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551.

The product of its digits is 1800, while the sum is 24.

The square root of 13421553 is about 3663.5437761817. The cubic root of 13421553 is about 237.6480509955.

Adding to 13421553 its reverse (35512431), we get a palindrome (48933984).

The spelling of 13421553 in words is "thirteen million, four hundred twenty-one thousand, five hundred fifty-three".