5250421 has 16 divisors (see below), whose sum is σ = 6019200. Its totient is φ = 4536000.

The previous prime is 5250409. The next prime is 5250437. The reversal of 5250421 is 1240525.

It is a 3-Lehmer number, since φ(5250421) divides (5250421-1)³.

It is a cyclic number.

It is not a de Polignac number, because 5250421 - 2¹⁹ = 4726133 is a prime.

It is a pancake number, because a pancake can be divided into 5250421 parts by 3240 straight cuts.

5250421 is a lucky number.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5250451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34696 + ... + 34846.

It is an arithmetic number, because the mean of its divisors is an integer number (376200).

It is a Poulet number, since it divides 2^5250420-1.

Almost surely, 2^5250421 is an apocalyptic number.

It is an amenable number.

5250421 is a deficient number, since it is larger than the sum of its proper divisors (768779).

5250421 is a wasteful number, since it uses less digits than its factorization.

5250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

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

The square root of 5250421 is about 2291.3797153680. The cubic root of 5250421 is about 173.8059778573.

Adding to 5250421 its reverse (1240525), we get a palindrome (6490946).

It can be divided in two parts, 52504 and 21, that added together give a palindrome (52525).

The spelling of 5250421 in words is "five million, two hundred fifty thousand, four hundred twenty-one".