7478945 has 8 divisors (see below), whose sum is σ = 9003840. Its totient is φ = 5963760.

The previous prime is 7478941. The next prime is 7478959. The reversal of 7478945 is 5498747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7478945 - 2² = 7478941 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 7478896 and 7478905.

It is not an unprimeable number, because it can be changed into a prime (7478941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605 + ... + 3914.

It is an arithmetic number, because the mean of its divisors is an integer number (1125480).

Almost surely, 2^7478945 is an apocalyptic number.

It is an amenable number.

7478945 is a deficient number, since it is larger than the sum of its proper divisors (1524895).

7478945 is a wasteful number, since it uses less digits than its factorization.

7478945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its digits is 282240, while the sum is 44.

The square root of 7478945 is about 2734.7659863323. The cubic root of 7478945 is about 195.5600380750.

The spelling of 7478945 in words is "seven million, four hundred seventy-eight thousand, nine hundred forty-five".