2872181 has 8 divisors (see below), whose sum is σ = 3193344. Its totient is φ = 2565360.

The previous prime is 2872153. The next prime is 2872183. The reversal of 2872181 is 1812782.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2872181 is a prime.

It is a super-2 number, since 2×2872181² = 16498847393522, 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 (2872183) 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, 3161 + ... + 3966.

It is an arithmetic number, because the mean of its divisors is an integer number (399168).

2^2872181 is an apocalyptic number.

It is an amenable number.

2872181 is a deficient number, since it is larger than the sum of its proper divisors (321163).

2872181 is a wasteful number, since it uses less digits than its factorization.

2872181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171.

The product of its digits is 1792, while the sum is 29.

The square root of 2872181 is about 1694.7510141611. The cubic root of 2872181 is about 142.1468592379.

The spelling of 2872181 in words is "two million, eight hundred seventy-two thousand, one hundred eighty-one".