2158845 has 16 divisors (see below), whose sum is σ = 3720192. Its totient is φ = 1062720.

The previous prime is 2158843. The next prime is 2158859. The reversal of 2158845 is 5488512.

It is not a de Polignac number, because 2158845 - 2¹ = 2158843 is a prime.

It is a super-2 number, since 2×2158845² = 9321223468050, which contains 22 as substring.

2158845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158841) 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, 5341 + ... + 5730.

It is an arithmetic number, because the mean of its divisors is an integer number (232512).

2^2158845 is an apocalyptic number.

It is an amenable number.

2158845 is a deficient number, since it is larger than the sum of its proper divisors (1561347).

2158845 is a wasteful number, since it uses less digits than its factorization.

2158845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11092.

The product of its digits is 12800, while the sum is 33.

The square root of 2158845 is about 1469.3008541480. The cubic root of 2158845 is about 129.2430368118.

It can be divided in two parts, 2158 and 845, that added together give a palindrome (3003).

The spelling of 2158845 in words is "two million, one hundred fifty-eight thousand, eight hundred forty-five".