7534421 has 8 divisors (see below), whose sum is σ = 7777080. Its totient is φ = 7293888.

The previous prime is 7534391. The next prime is 7534433. The reversal of 7534421 is 1244357.

It can be written as a sum of positive squares in 4 ways, for example, as 1234321 + 6300100 = 1111^2 + 2510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7534421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7534441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575 + ... + 10331.

It is an arithmetic number, because the mean of its divisors is an integer number (972135).

Almost surely, 2^7534421 is an apocalyptic number.

It is an amenable number.

7534421 is a deficient number, since it is larger than the sum of its proper divisors (242659).

7534421 is a wasteful number, since it uses less digits than its factorization.

7534421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its digits is 3360, while the sum is 26.

The square root of 7534421 is about 2744.8899795802. The cubic root of 7534421 is about 196.0423776894.

Adding to 7534421 its reverse (1244357), we get a palindrome (8778778).

Subtracting from 7534421 its reverse (1244357), we obtain a square (6290064 = 2508²).

The spelling of 7534421 in words is "seven million, five hundred thirty-four thousand, four hundred twenty-one".