13072381 has 8 divisors (see below), whose sum is σ = 14978880. Its totient is φ = 11175648.

The previous prime is 13072373. The next prime is 13072391. The reversal of 13072381 is 18327031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13072381 - 2³ = 13072373 is a prime.

It is a super-2 number, since 2×13072381² = 341774290018322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13072321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (1872360).

Almost surely, 2^13072381 is an apocalyptic number.

It is an amenable number.

13072381 is a deficient number, since it is larger than the sum of its proper divisors (1906499).

13072381 is an equidigital number, since it uses as much as digits as its factorization.

13072381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13072381 is about 3615.5747814144. The cubic root of 13072381 is about 235.5690509933.

The spelling of 13072381 in words is "thirteen million, seventy-two thousand, three hundred eighty-one".