2149815 has 16 divisors (see below), whose sum is σ = 3459456. Its totient is φ = 1140000.

The previous prime is 2149813. The next prime is 2149853. The reversal of 2149815 is 5189412.

It is a happy number.

It is not a de Polignac number, because 2149815 - 2¹ = 2149813 is a prime.

2149815 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3480 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (216216).

2^2149815 is an apocalyptic number.

2149815 is a deficient number, since it is larger than the sum of its proper divisors (1309641).

2149815 is a wasteful number, since it uses less digits than its factorization.

2149815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830.

The product of its digits is 2880, while the sum is 30.

The square root of 2149815 is about 1466.2247440280. The cubic root of 2149815 is about 129.0625860599.

The spelling of 2149815 in words is "two million, one hundred forty-nine thousand, eight hundred fifteen".