2101994 has 4 divisors (see below), whose sum is σ = 3152994. Its totient is φ = 1050996.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101994 is 4991012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 744769 = 1165^2 + 863^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525497 + ... + 525500.

2^2101994 is an apocalyptic number.

2101994 is a deficient number, since it is larger than the sum of its proper divisors (1051000).

2101994 is a wasteful number, since it uses less digits than its factorization.

2101994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050999.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2101994 is about 1449.8255067421. The cubic root of 2101994 is about 128.0984350239.

The spelling of 2101994 in words is "two million, one hundred one thousand, nine hundred ninety-four".