78465281 has 8 divisors (see below), whose sum is σ = 80080704. Its totient is φ = 76854960.

The previous prime is 78465253. The next prime is 78465287. The reversal of 78465281 is 18256487.

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 78465281 - 2²⁶ = 11356417 is a prime.

It is a super-2 number, since 2×78465281² = 12313600644817922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78465287) 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, 50486 + ... + 52016.

It is an arithmetic number, because the mean of its divisors is an integer number (10010088).

Almost surely, 2^78465281 is an apocalyptic number.

It is an amenable number.

78465281 is a deficient number, since it is larger than the sum of its proper divisors (1615423).

78465281 is a wasteful number, since it uses less digits than its factorization.

78465281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551.

The product of its digits is 107520, while the sum is 41.

The square root of 78465281 is about 8858.0630501256. The cubic root of 78465281 is about 428.1137515364.

The spelling of 78465281 in words is "seventy-eight million, four hundred sixty-five thousand, two hundred eighty-one".