7273645 has 8 divisors (see below), whose sum is σ = 8964504. Its totient is φ = 5661504.

The previous prime is 7273639. The next prime is 7273661. The reversal of 7273645 is 5463727.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3261636 + 4012009 = 1806^2 + 2003^2 .

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-7273645 is a prime.

It is a super-3 number, since 3×7273645³ (a number of 22 digits) contains 333 as substring.

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 7273645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19474 + ... + 19843.

It is an arithmetic number, because the mean of its divisors is an integer number (1120563).

Almost surely, 2^7273645 is an apocalyptic number.

It is an amenable number.

7273645 is a deficient number, since it is larger than the sum of its proper divisors (1690859).

7273645 is a wasteful number, since it uses less digits than its factorization.

7273645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39359.

The product of its digits is 35280, while the sum is 34.

The square root of 7273645 is about 2696.9695956759. The cubic root of 7273645 is about 193.7540103228.

The spelling of 7273645 in words is "seven million, two hundred seventy-three thousand, six hundred forty-five".