13770645 has 16 divisors (see below), whose sum is σ = 25180800. Its totient is φ = 6295104.

The previous prime is 13770637. The next prime is 13770667. The reversal of 13770645 is 54607731.

It is not a de Polignac number, because 13770645 - 2³ = 13770637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65470 + ... + 65679.

It is an arithmetic number, because the mean of its divisors is an integer number (1573800).

Almost surely, 2^13770645 is an apocalyptic number.

13770645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13770645 is a deficient number, since it is larger than the sum of its proper divisors (11410155).

13770645 is a wasteful number, since it uses less digits than its factorization.

13770645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131164.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 13770645 is about 3710.8819706372. The cubic root of 13770645 is about 239.6908345462.

The spelling of 13770645 in words is "thirteen million, seven hundred seventy thousand, six hundred forty-five".