2142815 has 4 divisors (see below), whose sum is σ = 2571384. Its totient is φ = 1714248.

The previous prime is 2142793. The next prime is 2142823. The reversal of 2142815 is 5182412.

2142815 = T₅₂₇ + T₅₂₈ + ... + T₅₄₁.

2142815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2142815 - 2¹⁰ = 2141791 is a prime.

It is a super-2 number, since 2×2142815² = 9183312248450, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214277 + ... + 214286.

It is an arithmetic number, because the mean of its divisors is an integer number (642846).

2^2142815 is an apocalyptic number.

2142815 is a deficient number, since it is larger than the sum of its proper divisors (428569).

2142815 is an equidigital number, since it uses as much as digits as its factorization.

2142815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428568.

The product of its digits is 640, while the sum is 23.

The square root of 2142815 is about 1463.8357148259. The cubic root of 2142815 is about 128.9223537702.

The spelling of 2142815 in words is "two million, one hundred forty-two thousand, eight hundred fifteen".