2101970 has 64 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 684288.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101970 is 791012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56792 + ... + 56828.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^2101970 is an apocalyptic number.

2101970 is an abundant number, since it is smaller than the sum of its proper divisors (2494510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101970 is a wasteful number, since it uses less digits than its factorization.

2101970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2101970 is about 1449.8172298604. The cubic root of 2101970 is about 128.0979474910.

Adding to 2101970 its reverse (791012), we get a palindrome (2892982).

The spelling of 2101970 in words is "two million, one hundred one thousand, nine hundred seventy".