78254065 has 8 divisors (see below), whose sum is σ = 98847360. Its totient is φ = 59308272.

The previous prime is 78254063. The next prime is 78254101. The reversal of 78254065 is 56045287.

It is a happy number.

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

It is not a de Polignac number, because 78254065 - 2¹ = 78254063 is a prime.

It is a super-2 number, since 2×78254065² = 12247397378048450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78254063) 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, 411769 + ... + 411958.

It is an arithmetic number, because the mean of its divisors is an integer number (12355920).

Almost surely, 2^78254065 is an apocalyptic number.

It is an amenable number.

78254065 is a deficient number, since it is larger than the sum of its proper divisors (20593295).

78254065 is a wasteful number, since it uses less digits than its factorization.

78254065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823751.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 78254065 is about 8846.1327708779. The cubic root of 78254065 is about 427.7292684010.

The spelling of 78254065 in words is "seventy-eight million, two hundred fifty-four thousand, sixty-five".