2021137 has 2 divisors, whose sum is σ = 2021138. Its totient is φ = 2021136.

The previous prime is 2021119. The next prime is 2021143. The reversal of 2021137 is 7311202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 746496 = 1129^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021137 - 2⁷ = 2021009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021137.

It is not a weakly prime, because it can be changed into another prime (2021167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010568 + 1010569.

It is an arithmetic number, because the mean of its divisors is an integer number (1010569).

2^2021137 is an apocalyptic number.

It is an amenable number.

2021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021137 is an equidigital number, since it uses as much as digits as its factorization.

2021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2021137 is about 1421.6669792888. Note that the first 3 decimals coincide. The cubic root of 2021137 is about 126.4343996863.

Adding to 2021137 its reverse (7311202), we get a palindrome (9332339).

It can be divided in two parts, 20 and 21137, that multiplied together give a triangular number (422740 = T₉₁₉).

The spelling of 2021137 in words is "two million, twenty-one thousand, one hundred thirty-seven".