7243005 has 32 divisors (see below), whose sum is σ = 14450688. Its totient is φ = 3009600.

The previous prime is 7243001. The next prime is 7243007. The reversal of 7243005 is 5003427.

It is a happy number.

It is not a de Polignac number, because 7243005 - 2² = 7243001 is a prime.

It is a super-2 number, since 2×7243005² = 104922242860050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

7243005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7243001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1981 + ... + 4290.

It is an arithmetic number, because the mean of its divisors is an integer number (451584).

Almost surely, 2^7243005 is an apocalyptic number.

It is an amenable number.

7243005 is a deficient number, since it is larger than the sum of its proper divisors (7207683).

7243005 is a wasteful number, since it uses less digits than its factorization.

7243005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 7243005 is about 2691.2831512124. The cubic root of 7243005 is about 193.4815665258.

The spelling of 7243005 in words is "seven million, two hundred forty-three thousand, five".