2164858 has 4 divisors (see below), whose sum is σ = 3247290. Its totient is φ = 1082428.

The previous prime is 2164853. The next prime is 2164859. The reversal of 2164858 is 8584612.

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

It can be written as a sum of positive squares in only one way, i.e., 2152089 + 12769 = 1467^2 + 113^2 .

It is a super-2 number, since 2×2164858² = 9373220320328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2164853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541213 + ... + 541216.

2^2164858 is an apocalyptic number.

2164858 is a deficient number, since it is larger than the sum of its proper divisors (1082432).

2164858 is a wasteful number, since it uses less digits than its factorization.

2164858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082431.

The product of its digits is 15360, while the sum is 34.

The square root of 2164858 is about 1471.3456426007. The cubic root of 2164858 is about 129.3629185043.

The spelling of 2164858 in words is "two million, one hundred sixty-four thousand, eight hundred fifty-eight".