7281113 has 4 divisors (see below), whose sum is σ = 8321280. Its totient is φ = 6240948.

The previous prime is 7281103. The next prime is 7281167. The reversal of 7281113 is 3111827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7281113 - 2⁴ = 7281097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7281103) 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, 520073 + ... + 520086.

It is an arithmetic number, because the mean of its divisors is an integer number (2080320).

Almost surely, 2^7281113 is an apocalyptic number.

It is an amenable number.

7281113 is a deficient number, since it is larger than the sum of its proper divisors (1040167).

7281113 is a wasteful number, since it uses less digits than its factorization.

7281113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040166.

The product of its digits is 336, while the sum is 23.

The square root of 7281113 is about 2698.3537573862. The cubic root of 7281113 is about 193.8202980426.

The spelling of 7281113 in words is "seven million, two hundred eighty-one thousand, one hundred thirteen".