7284745 has 24 divisors (see below), whose sum is σ = 9763416. Its totient is φ = 5211648.

The previous prime is 7284689. The next prime is 7284749. The reversal of 7284745 is 5474827.

7284745 = 1908² + 1909².

It can be written as a sum of positive squares in 12 ways, for example, as 3644281 + 3640464 = 1909^2 + 1908^2 .

It is not a de Polignac number, because 7284745 - 2⁷ = 7284617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

7284745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7284749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31149 + ... + 31381.

It is an arithmetic number, because the mean of its divisors is an integer number (406809).

Almost surely, 2^7284745 is an apocalyptic number.

7284745 is the 1909-th centered square number.

It is an amenable number.

7284745 is a deficient number, since it is larger than the sum of its proper divisors (2478671).

7284745 is a wasteful number, since it uses less digits than its factorization.

7284745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 288 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 7284745 is about 2699.0266764150. The cubic root of 7284745 is about 193.8525201450.

The spelling of 7284745 in words is "seven million, two hundred eighty-four thousand, seven hundred forty-five".