2021949 has 8 divisors (see below), whose sum is σ = 2995520. Its totient is φ = 1347948.

The previous prime is 2021933. The next prime is 2021959. The reversal of 2021949 is 9491202.

It is not a de Polignac number, because 2021949 - 2⁴ = 2021933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 74887 = 2021949 / (2 + 0 + 2 + 1 + 9 + 4 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021959) 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, 37417 + ... + 37470.

It is an arithmetic number, because the mean of its divisors is an integer number (374440).

2^2021949 is an apocalyptic number.

It is an amenable number.

2021949 is a deficient number, since it is larger than the sum of its proper divisors (973571).

2021949 is an equidigital number, since it uses as much as digits as its factorization.

2021949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74896 (or 74890 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2021949 is about 1421.9525308533. The cubic root of 2021949 is about 126.4513292639.

The spelling of 2021949 in words is "two million, twenty-one thousand, nine hundred forty-nine".