2145218 has 8 divisors (see below), whose sum is σ = 3256848. Its totient is φ = 1059604.

The previous prime is 2145197. The next prime is 2145239. The reversal of 2145218 is 8125412.

It is an interprime number because it is at equal distance from previous prime (2145197) and next prime (2145239).

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

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

It is a Curzon number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2145193 and 2145202.

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, 6296 + ... + 6627.

It is an arithmetic number, because the mean of its divisors is an integer number (407106).

2^2145218 is an apocalyptic number.

2145218 is a deficient number, since it is larger than the sum of its proper divisors (1111630).

2145218 is a wasteful number, since it uses less digits than its factorization.

2145218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13008.

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

The square root of 2145218 is about 1464.6562736697. The cubic root of 2145218 is about 128.9705278905.

The spelling of 2145218 in words is "two million, one hundred forty-five thousand, two hundred eighteen".