2121394 has 16 divisors (see below), whose sum is σ = 3495456. Its totient is φ = 957600.

The previous prime is 2121389. The next prime is 2121403. The reversal of 2121394 is 4931212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 2¹⁹ + 1 + 3¹³ + 9³ + 4 .

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, 4414 + ... + 4870.

It is an arithmetic number, because the mean of its divisors is an integer number (218466).

2^2121394 is an apocalyptic number.

2121394 is a deficient number, since it is larger than the sum of its proper divisors (1374062).

2121394 is a wasteful number, since it uses less digits than its factorization.

2121394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 432, while the sum is 22.

The square root of 2121394 is about 1456.5006007551. The cubic root of 2121394 is about 128.4913164657.

The spelling of 2121394 in words is "two million, one hundred twenty-one thousand, three hundred ninety-four".