13280945 has 4 divisors (see below), whose sum is σ = 15937140. Its totient is φ = 10624752.

The previous prime is 13280933. The next prime is 13280951. The reversal of 13280945 is 54908231.

13280945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4946176 + 8334769 = 2224^2 + 2887^2 .

It is a cyclic number.

It is not a de Polignac number, because 13280945 - 2⁶ = 13280881 is a prime.

It is a super-4 number, since 4×13280945⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328090 + ... + 1328099.

It is an arithmetic number, because the mean of its divisors is an integer number (3984285).

Almost surely, 2^13280945 is an apocalyptic number.

It is an amenable number.

13280945 is a deficient number, since it is larger than the sum of its proper divisors (2656195).

13280945 is an equidigital number, since it uses as much as digits as its factorization.

13280945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656194.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 13280945 is about 3644.3030883833. The cubic root of 13280945 is about 236.8152464712.

The spelling of 13280945 in words is "thirteen million, two hundred eighty thousand, nine hundred forty-five".