5402021 has 2 divisors, whose sum is σ = 5402022. Its totient is φ = 5402020.

The previous prime is 5402011. The next prime is 5402051. The reversal of 5402021 is 1202045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4351396 + 1050625 = 2086^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 5402021 - 2¹⁸ = 5139877 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5401987 and 5402005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5402011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2701010 + 2701011.

It is an arithmetic number, because the mean of its divisors is an integer number (2701011).

Almost surely, 2^5402021 is an apocalyptic number.

It is an amenable number.

5402021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5402021 is an equidigital number, since it uses as much as digits as its factorization.

5402021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 5402021 is about 2324.2248170089. The cubic root of 5402021 is about 175.4629483771.

Adding to 5402021 its reverse (1202045), we get a palindrome (6604066).

The spelling of 5402021 in words is "five million, four hundred two thousand, twenty-one".