2042981 has 2 divisors, whose sum is σ = 2042982. Its totient is φ = 2042980.

The previous prime is 2042969. The next prime is 2042983. The reversal of 2042981 is 1892402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 982081 = 1030^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042981 - 2¹⁰ = 2041957 is a prime.

It is a super-2 number, since 2×2042981² = 8347542732722, which contains 22 as substring.

Together with 2042983, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2042981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2042983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021490 + 1021491.

It is an arithmetic number, because the mean of its divisors is an integer number (1021491).

2^2042981 is an apocalyptic number.

It is an amenable number.

2042981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042981 is an equidigital number, since it uses as much as digits as its factorization.

2042981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2042981 is about 1429.3288634880. The cubic root of 2042981 is about 126.8882601589. Note that the first 3 decimals are identical.

The spelling of 2042981 in words is "two million, forty-two thousand, nine hundred eighty-one".