2049981 has 8 divisors (see below), whose sum is σ = 2827680. Its totient is φ = 1319472.

The previous prime is 2049977. The next prime is 2049991. The reversal of 2049981 is 1899402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2049981 - 2² = 2049977 is a prime.

It is a super-2 number, since 2×2049981² = 8404844200722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049941) 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, 11695 + ... + 11868.

It is an arithmetic number, because the mean of its divisors is an integer number (353460).

2^2049981 is an apocalyptic number.

It is an amenable number.

2049981 is a deficient number, since it is larger than the sum of its proper divisors (777699).

2049981 is a wasteful number, since it uses less digits than its factorization.

2049981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23595.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 2049981 is about 1431.7754712245. The cubic root of 2049981 is about 127.0330168151.

The spelling of 2049981 in words is "two million, forty-nine thousand, nine hundred eighty-one".