13377281 has 4 divisors (see below), whose sum is σ = 13661952. Its totient is φ = 13092612.

The previous prime is 13377251. The next prime is 13377289. The reversal of 13377281 is 18277331.

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 a cyclic number.

It is not a de Polignac number, because 13377281 - 2¹⁰ = 13376257 is a prime.

It is a super-2 number, since 2×13377281² = 357903293905922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13377289) 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, 142265 + ... + 142358.

It is an arithmetic number, because the mean of its divisors is an integer number (3415488).

Almost surely, 2^13377281 is an apocalyptic number.

It is an amenable number.

13377281 is a deficient number, since it is larger than the sum of its proper divisors (284671).

13377281 is an equidigital number, since it uses as much as digits as its factorization.

13377281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284670.

The product of its digits is 7056, while the sum is 32.

The square root of 13377281 is about 3657.4965481870. The cubic root of 13377281 is about 237.3864631839.

The spelling of 13377281 in words is "thirteen million, three hundred seventy-seven thousand, two hundred eighty-one".