2121418 has 16 divisors (see below), whose sum is σ = 3457440. Its totient is φ = 970416.

The previous prime is 2121403. The next prime is 2121433. The reversal of 2121418 is 8141212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121403) and next prime (2121433).

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

It is a junction number, because it is equal to n+sod(n) for n = 2121395 and 2121404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321 + ... + 3907.

It is an arithmetic number, because the mean of its divisors is an integer number (216090).

2^2121418 is an apocalyptic number.

2121418 is a deficient number, since it is larger than the sum of its proper divisors (1336022).

2121418 is a wasteful number, since it uses less digits than its factorization.

2121418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 128, while the sum is 19.

The square root of 2121418 is about 1456.5088396573. The cubic root of 2121418 is about 128.4918010182.

The spelling of 2121418 in words is "two million, one hundred twenty-one thousand, four hundred eighteen".