2891215 has 16 divisors (see below), whose sum is σ = 3741696. Its totient is φ = 2138400.

The previous prime is 2891201. The next prime is 2891219. The reversal of 2891215 is 5121982.

It is not a de Polignac number, because 2891215 - 2⁷ = 2891087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3160 + ... + 3970.

It is an arithmetic number, because the mean of its divisors is an integer number (233856).

2^2891215 is an apocalyptic number.

2891215 is a deficient number, since it is larger than the sum of its proper divisors (850481).

2891215 is a wasteful number, since it uses less digits than its factorization.

2891215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its digits is 1440, while the sum is 28.

The square root of 2891215 is about 1700.3573153899. The cubic root of 2891215 is about 142.4601714893.

The spelling of 2891215 in words is "two million, eight hundred ninety-one thousand, two hundred fifteen".