7478145 has 24 divisors (see below), whose sum is σ = 13067496. Its totient is φ = 3955968.

The previous prime is 7478137. The next prime is 7478189. The reversal of 7478145 is 5418747.

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 7436529 = 204^2 + 2727^2 .

It is not a de Polignac number, because 7478145 - 2³ = 7478137 is a prime.

It is an alternating number because its digits alternate between odd and even.

7478145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5559 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (544479).

Almost surely, 2^7478145 is an apocalyptic number.

It is an amenable number.

7478145 is a deficient number, since it is larger than the sum of its proper divisors (5589351).

7478145 is a wasteful number, since it uses less digits than its factorization.

7478145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1358 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 7478145 is about 2734.6197176207. The cubic root of 7478145 is about 195.5530650055.

The spelling of 7478145 in words is "seven million, four hundred seventy-eight thousand, one hundred forty-five".