13921772 has 6 divisors (see below), whose sum is σ = 24363108. Its totient is φ = 6960884.

The previous prime is 13921771. The next prime is 13921777. The reversal of 13921772 is 27712931.

It is not an unprimeable number, because it can be changed into a prime (13921771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1740218 + ... + 1740225.

It is an arithmetic number, because the mean of its divisors is an integer number (4060518).

Almost surely, 2^13921772 is an apocalyptic number.

It is an amenable number.

13921772 is a deficient number, since it is larger than the sum of its proper divisors (10441336).

13921772 is a wasteful number, since it uses less digits than its factorization.

13921772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480447 (or 3480445 counting only the distinct ones).

The product of its digits is 5292, while the sum is 32.

The square root of 13921772 is about 3731.1890866050. The cubic root of 13921772 is about 240.5644814804.

The spelling of 13921772 in words is "thirteen million, nine hundred twenty-one thousand, seven hundred seventy-two".