13776945 has 32 divisors (see below), whose sum is σ = 27132672. Its totient is φ = 5812992.

The previous prime is 13776937. The next prime is 13776947. The reversal of 13776945 is 54967731.

It is not a de Polignac number, because 13776945 - 2³ = 13776937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13776897 and 13776906.

It is not an unprimeable number, because it can be changed into a prime (13776947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3682 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (847896).

Almost surely, 2^13776945 is an apocalyptic number.

13776945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13776945 is a deficient number, since it is larger than the sum of its proper divisors (13355727).

13776945 is a wasteful number, since it uses less digits than its factorization.

13776945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121.

The product of its digits is 158760, while the sum is 42.

The square root of 13776945 is about 3711.7307283800. The cubic root of 13776945 is about 239.7273814191.

The spelling of 13776945 in words is "thirteen million, seven hundred seventy-six thousand, nine hundred forty-five".