2121370 has 16 divisors (see below), whose sum is σ = 3836448. Its totient is φ = 844560.

The previous prime is 2121367. The next prime is 2121373. The reversal of 2121370 is 731212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121367) and next prime (2121373).

It is not an unprimeable number, because it can be changed into a prime (2121373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725 + ... + 3415.

It is an arithmetic number, because the mean of its divisors is an integer number (239778).

2^2121370 is an apocalyptic number.

2121370 is a deficient number, since it is larger than the sum of its proper divisors (1715078).

2121370 is a wasteful number, since it uses less digits than its factorization.

2121370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2121370 is about 1456.4923618063. The cubic root of 2121370 is about 128.4908319096.

Adding to 2121370 its reverse (731212), we get a palindrome (2852582).

The spelling of 2121370 in words is "two million, one hundred twenty-one thousand, three hundred seventy".