5390021 has 16 divisors (see below), whose sum is σ = 6749568. Its totient is φ = 4190400.

The previous prime is 5390017. The next prime is 5390023. The reversal of 5390021 is 1200935.

It is a cyclic number.

It is not a de Polignac number, because 5390021 - 2² = 5390017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5389975 and 5390002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5390023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5066 + ... + 6036.

It is an arithmetic number, because the mean of its divisors is an integer number (421848).

Almost surely, 2^5390021 is an apocalyptic number.

It is an amenable number.

5390021 is a deficient number, since it is larger than the sum of its proper divisors (1359547).

5390021 is a wasteful number, since it uses less digits than its factorization.

5390021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 5390021 is about 2321.6418759145. The cubic root of 5390021 is about 175.3329281252.

Adding to 5390021 its reverse (1200935), we get a palindrome (6590956).

The spelling of 5390021 in words is "five million, three hundred ninety thousand, twenty-one".