13420745 has 16 divisors (see below), whose sum is σ = 18258240. Its totient is φ = 9388224.

The previous prime is 13420741. The next prime is 13420747. The reversal of 13420745 is 54702431.

It is a cyclic number.

It is not a de Polignac number, because 13420745 - 2² = 13420741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13420741) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4199 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^13420745 is an apocalyptic number.

It is an amenable number.

13420745 is a deficient number, since it is larger than the sum of its proper divisors (4837495).

13420745 is a wasteful number, since it uses less digits than its factorization.

13420745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 13420745 is about 3663.4334987823. The cubic root of 13420745 is about 237.6432819627.

The spelling of 13420745 in words is "thirteen million, four hundred twenty thousand, seven hundred forty-five".