7573421 has 4 divisors (see below), whose sum is σ = 7617372. Its totient is φ = 7529472.

The previous prime is 7573409. The next prime is 7573427. The reversal of 7573421 is 1243757.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243757 = 773 ⋅1609.

It can be written as a sum of positive squares in 2 ways, for example, as 3222025 + 4351396 = 1795^2 + 2086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7573421 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 (7573427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21716 + ... + 22061.

It is an arithmetic number, because the mean of its divisors is an integer number (1904343).

Almost surely, 2^7573421 is an apocalyptic number.

It is an amenable number.

7573421 is a deficient number, since it is larger than the sum of its proper divisors (43951).

7573421 is a wasteful number, since it uses less digits than its factorization.

7573421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43950.

The product of its digits is 5880, while the sum is 29.

The square root of 7573421 is about 2751.9849200168. The cubic root of 7573421 is about 196.3800501138.

The spelling of 7573421 in words is "seven million, five hundred seventy-three thousand, four hundred twenty-one".