2145818 has 8 divisors (see below), whose sum is σ = 3226080. Its totient is φ = 1070460.

The previous prime is 2145779. The next prime is 2145821. The reversal of 2145818 is 8185412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (403260).

2^2145818 is an apocalyptic number.

2145818 is a deficient number, since it is larger than the sum of its proper divisors (1080262).

2145818 is a wasteful number, since it uses less digits than its factorization.

2145818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452.

The product of its digits is 2560, while the sum is 29.

The square root of 2145818 is about 1464.8610855641. The cubic root of 2145818 is about 128.9825507717.

The spelling of 2145818 in words is "two million, one hundred forty-five thousand, eight hundred eighteen".