2072381 has 4 divisors (see below), whose sum is σ = 2139264. Its totient is φ = 2005500.

The previous prime is 2072363. The next prime is 2072383. The reversal of 2072381 is 1832702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2072381 is a prime.

It is a super-2 number, since 2×2072381² = 8589526018322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2072383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33395 + ... + 33456.

It is an arithmetic number, because the mean of its divisors is an integer number (534816).

2^2072381 is an apocalyptic number.

It is an amenable number.

2072381 is a deficient number, since it is larger than the sum of its proper divisors (66883).

2072381 is an equidigital number, since it uses as much as digits as its factorization.

2072381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66882.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2072381 is about 1439.5766738872. The cubic root of 2072381 is about 127.4940353483.

The spelling of 2072381 in words is "two million, seventy-two thousand, three hundred eighty-one".