7275145 has 4 divisors (see below), whose sum is σ = 8730180. Its totient is φ = 5820112.

The previous prime is 7275091. The next prime is 7275161. The reversal of 7275145 is 5415727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 3948169 = 1824^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 7275145 - 2⁷ = 7275017 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727510 + ... + 727519.

It is an arithmetic number, because the mean of its divisors is an integer number (2182545).

Almost surely, 2^7275145 is an apocalyptic number.

It is an amenable number.

7275145 is a deficient number, since it is larger than the sum of its proper divisors (1455035).

7275145 is a wasteful number, since it uses less digits than its factorization.

7275145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455034.

The product of its digits is 9800, while the sum is 31.

The square root of 7275145 is about 2697.2476712382. The cubic root of 7275145 is about 193.7673283149.

The spelling of 7275145 in words is "seven million, two hundred seventy-five thousand, one hundred forty-five".