7287945 has 32 divisors (see below), whose sum is σ = 13762560. Its totient is φ = 3222720.

The previous prime is 7287919. The next prime is 7287947. The reversal of 7287945 is 5497827.

7287945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7287945 - 2⁷ = 7287817 is a prime.

It is a super-2 number, since 2×7287945² = 106228284646050, which contains 22 as substring.

7287945 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7287897 and 7287906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7287947) 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, 2136 + ... + 4374.

It is an arithmetic number, because the mean of its divisors is an integer number (430080).

Almost surely, 2^7287945 is an apocalyptic number.

It is an amenable number.

7287945 is a deficient number, since it is larger than the sum of its proper divisors (6474615).

7287945 is a wasteful number, since it uses less digits than its factorization.

7287945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285.

The product of its digits is 141120, while the sum is 42.

The square root of 7287945 is about 2699.6194176217. The cubic root of 7287945 is about 193.8809007886.

The spelling of 7287945 in words is "seven million, two hundred eighty-seven thousand, nine hundred forty-five".