78234265 has 4 divisors (see below), whose sum is σ = 93881124. Its totient is φ = 62587408.

The previous prime is 78234259. The next prime is 78234271. The reversal of 78234265 is 56243287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56243287 = 19 ⋅2960173.

It is an interprime number because it is at equal distance from previous prime (78234259) and next prime (78234271).

It can be written as a sum of positive squares in 2 ways, for example, as 32752729 + 45481536 = 5723^2 + 6744^2 .

It is a cyclic number.

It is not a de Polignac number, because 78234265 - 2⁷ = 78234137 is a prime.

It is a super-2 number, since 2×78234265² = 12241200440180450, which contains 22 as substring.

It is a Duffinian 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, 7823422 + ... + 7823431.

It is an arithmetic number, because the mean of its divisors is an integer number (23470281).

Almost surely, 2^78234265 is an apocalyptic number.

It is an amenable number.

78234265 is a deficient number, since it is larger than the sum of its proper divisors (15646859).

78234265 is a wasteful number, since it uses less digits than its factorization.

78234265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15646858.

The product of its digits is 80640, while the sum is 37.

The square root of 78234265 is about 8845.0135669766. The cubic root of 78234265 is about 427.6931903864.

The spelling of 78234265 in words is "seventy-eight million, two hundred thirty-four thousand, two hundred sixty-five".