5213421 has 12 divisors (see below), whose sum is σ = 7555548. Its totient is φ = 3464064.

The previous prime is 5213419. The next prime is 5213423. The reversal of 5213421 is 1243125.

It is an interprime number because it is at equal distance from previous prime (5213419) and next prime (5213423).

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 3663396 = 1245^2 + 1914^2 .

It is not a de Polignac number, because 5213421 - 2¹ = 5213419 is a prime.

5213421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5213394 and 5213403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5213423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2581 + ... + 4133.

It is an arithmetic number, because the mean of its divisors is an integer number (629629).

Almost surely, 2^5213421 is an apocalyptic number.

It is an amenable number.

5213421 is a deficient number, since it is larger than the sum of its proper divisors (2342127).

5213421 is a wasteful number, since it uses less digits than its factorization.

5213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1929 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 5213421 is about 2283.2917027835. The cubic root of 5213421 is about 173.3967416764.

Adding to 5213421 its reverse (1243125), we get a palindrome (6456546).

The spelling of 5213421 in words is "five million, two hundred thirteen thousand, four hundred twenty-one".