13404645 has 12 divisors (see below), whose sum is σ = 23234796. Its totient is φ = 7149120.

The previous prime is 13404613. The next prime is 13404647. The reversal of 13404645 is 54640431.

13404645 is a `hidden beast` number, since 13 + 4 + 0 + 4 + 645 = 666.

13404645 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2965284 + 10439361 = 1722^2 + 3231^2 .

It is not a de Polignac number, because 13404645 - 2⁵ = 13404613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13404647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148896 + ... + 148985.

It is an arithmetic number, because the mean of its divisors is an integer number (1936233).

Almost surely, 2^13404645 is an apocalyptic number.

13404645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13404645 is a deficient number, since it is larger than the sum of its proper divisors (9830151).

13404645 is a wasteful number, since it uses less digits than its factorization.

13404645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297892 (or 297889 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 13404645 is about 3661.2354472227. The cubic root of 13404645 is about 237.5482155111.

The spelling of 13404645 in words is "thirteen million, four hundred four thousand, six hundred forty-five".