13021772 has 24 divisors (see below), whose sum is σ = 24192000. Its totient is φ = 6119696.

The previous prime is 13021769. The next prime is 13021777. The reversal of 13021772 is 27712031.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (13021777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4229 + ... + 6627.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^13021772 is an apocalyptic number.

It is an amenable number.

13021772 is a deficient number, since it is larger than the sum of its proper divisors (11170228).

13021772 is a wasteful number, since it uses less digits than its factorization.

13021772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 13021772 is about 3608.5692455598. The cubic root of 13021772 is about 235.2646603270.

The spelling of 13021772 in words is "thirteen million, twenty-one thousand, seven hundred seventy-two".