13455649 has 4 divisors (see below), whose sum is σ = 13505940. Its totient is φ = 13405360.

The previous prime is 13455647. The next prime is 13455661. The reversal of 13455649 is 94655431.

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 4545424 + 8910225 = 2132^2 + 2985^2 .

It is a cyclic number.

It is not a de Polignac number, because 13455649 - 2¹ = 13455647 is a prime.

It is a super-2 number, since 2×13455649² = 362108980022402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13455641) 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, 24742 + ... + 25279.

It is an arithmetic number, because the mean of its divisors is an integer number (3376485).

Almost surely, 2^13455649 is an apocalyptic number.

It is an amenable number.

13455649 is a deficient number, since it is larger than the sum of its proper divisors (50291).

13455649 is an equidigital number, since it uses as much as digits as its factorization.

13455649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50290.

The product of its digits is 64800, while the sum is 37.

The square root of 13455649 is about 3668.1942424032. The cubic root of 13455649 is about 237.8491205276.

The spelling of 13455649 in words is "thirteen million, four hundred fifty-five thousand, six hundred forty-nine".