2392021 has 2 divisors, whose sum is σ = 2392022. Its totient is φ = 2392020.

The previous prime is 2392009. The next prime is 2392057. The reversal of 2392021 is 1202932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 108900 = 1511^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2392021 - 2¹¹ = 2389973 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 3¹³ + 9⁶ + 2¹² + 0 + 2¹⁸ + 1 .

2392021 is a lucky number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2392021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2392001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1196010 + 1196011.

It is an arithmetic number, because the mean of its divisors is an integer number (1196011).

2^2392021 is an apocalyptic number.

It is an amenable number.

2392021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2392021 is an equidigital number, since it uses as much as digits as its factorization.

2392021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2392021 is about 1546.6159833650. The cubic root of 2392021 is about 133.7380529114.

Adding to 2392021 its reverse (1202932), we get a palindrome (3594953).

The spelling of 2392021 in words is "two million, three hundred ninety-two thousand, twenty-one".