2158005 has 16 divisors (see below), whose sum is σ = 3527424. Its totient is φ = 1126080.

The previous prime is 2157989. The next prime is 2158019. The reversal of 2158005 is 5008512.

It is not a de Polignac number, because 2158005 - 2⁴ = 2157989 is a prime.

2158005 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (220464).

2^2158005 is an apocalyptic number.

It is an amenable number.

2158005 is a deficient number, since it is larger than the sum of its proper divisors (1369419).

2158005 is a wasteful number, since it uses less digits than its factorization.

2158005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2158005 is about 1469.0149760979. The cubic root of 2158005 is about 129.2262719469.

The spelling of 2158005 in words is "two million, one hundred fifty-eight thousand, five".