7514221 has 24 divisors (see below), whose sum is σ = 9451512. Its totient is φ = 5913600.

The previous prime is 7514189. The next prime is 7514231. The reversal of 7514221 is 1224157.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1334025 + 6180196 = 1155^2 + 2486^2 .

It is not a de Polignac number, because 7514221 - 2⁵ = 7514189 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7514192 and 7514201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7514231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26601 + ... + 26881.

It is an arithmetic number, because the mean of its divisors is an integer number (393813).

Almost surely, 2^7514221 is an apocalyptic number.

It is an amenable number.

7514221 is a deficient number, since it is larger than the sum of its proper divisors (1937291).

7514221 is a wasteful number, since it uses less digits than its factorization.

7514221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 322 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 7514221 is about 2741.2079454138. The cubic root of 7514221 is about 195.8670224623.

Adding to 7514221 its reverse (1224157), we get a palindrome (8738378).

Subtracting from 7514221 its reverse (1224157), we obtain a square (6290064 = 2508²).

The spelling of 7514221 in words is "seven million, five hundred fourteen thousand, two hundred twenty-one".