13645572 has 48 divisors (see below), whose sum is σ = 33915840. Its totient is φ = 4257792.

The previous prime is 13645537. The next prime is 13645589. The reversal of 13645572 is 27554631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21808 + ... + 22424.

It is an arithmetic number, because the mean of its divisors is an integer number (706580).

Almost surely, 2^13645572 is an apocalyptic number.

13645572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13645572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16957920).

13645572 is an abundant number, since it is smaller than the sum of its proper divisors (20270268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13645572 is a wasteful number, since it uses less digits than its factorization.

13645572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 738 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 13645572 is about 3693.9913372936. The cubic root of 13645572 is about 238.9629559248.

The spelling of 13645572 in words is "thirteen million, six hundred forty-five thousand, five hundred seventy-two".