78245147 has 8 divisors (see below), whose sum is σ = 81604992. Its totient is φ = 74937600.

The previous prime is 78245137. The next prime is 78245183. The reversal of 78245147 is 74154287.

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

It is a cyclic number.

It is not a de Polignac number, because 78245147 - 2⁸ = 78244891 is a prime.

It is a super-2 number, since 2×78245147² = 12244606058103218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78245147.

It is not an unprimeable number, because it can be changed into a prime (78245107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10004 + ... + 16017.

It is an arithmetic number, because the mean of its divisors is an integer number (10200624).

Almost surely, 2^78245147 is an apocalyptic number.

78245147 is a deficient number, since it is larger than the sum of its proper divisors (3359845).

78245147 is a wasteful number, since it uses less digits than its factorization.

78245147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26149.

The product of its digits is 62720, while the sum is 38.

The square root of 78245147 is about 8845.6286944456. The cubic root of 78245147 is about 427.7130194707.

The spelling of 78245147 in words is "seventy-eight million, two hundred forty-five thousand, one hundred forty-seven".