5420521 has 4 divisors (see below), whose sum is σ = 5509444. Its totient is φ = 5331600.

The previous prime is 5420509. The next prime is 5420531. The reversal of 5420521 is 1250245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250245 = 5 ⋅250049.

It can be written as a sum of positive squares in 2 ways, for example, as 1946025 + 3474496 = 1395^2 + 1864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5420521 is a prime.

It is a super-2 number, since 2×5420521² = 58764095822882, which contains 22 as substring.

It is a Duffinian number.

5420521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5420531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44370 + ... + 44491.

It is an arithmetic number, because the mean of its divisors is an integer number (1377361).

Almost surely, 2^5420521 is an apocalyptic number.

It is an amenable number.

5420521 is a deficient number, since it is larger than the sum of its proper divisors (88923).

5420521 is an equidigital number, since it uses as much as digits as its factorization.

5420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88922.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 5420521 is about 2328.2012370068. The cubic root of 5420521 is about 175.6630195505.

Adding to 5420521 its reverse (1250245), we get a palindrome (6670766).

The spelling of 5420521 in words is "five million, four hundred twenty thousand, five hundred twenty-one".