7273621 has 4 divisors (see below), whose sum is σ = 7304044. Its totient is φ = 7243200.

The previous prime is 7273619. The next prime is 7273627. The reversal of 7273621 is 1263727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1263727 = 43 ⋅29389.

It can be written as a sum of positive squares in 2 ways, for example, as 4431025 + 2842596 = 2105^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 7273621 - 2¹ = 7273619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7273621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7273627) 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, 14850 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (1826011).

Almost surely, 2^7273621 is an apocalyptic number.

It is an amenable number.

7273621 is a deficient number, since it is larger than the sum of its proper divisors (30423).

7273621 is a wasteful number, since it uses less digits than its factorization.

7273621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30422.

The product of its digits is 3528, while the sum is 28.

The square root of 7273621 is about 2696.9651462338. The cubic root of 7273621 is about 193.7537972201.

The spelling of 7273621 in words is "seven million, two hundred seventy-three thousand, six hundred twenty-one".