78341281 has 4 divisors (see below), whose sum is σ = 78375600. Its totient is φ = 78306964.

The previous prime is 78341279. The next prime is 78341297. The reversal of 78341281 is 18214387.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18214387 = 2039 ⋅8933.

It is a cyclic number.

It is not a de Polignac number, because 78341281 - 2¹ = 78341279 is a prime.

It is a super-2 number, since 2×78341281² = 12274712617441922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78341881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13471 + ... + 18388.

It is an arithmetic number, because the mean of its divisors is an integer number (19593900).

Almost surely, 2^78341281 is an apocalyptic number.

It is an amenable number.

78341281 is a deficient number, since it is larger than the sum of its proper divisors (34319).

78341281 is a wasteful number, since it uses less digits than its factorization.

78341281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34318.

The product of its digits is 10752, while the sum is 34.

The square root of 78341281 is about 8851.0610098451. The cubic root of 78341281 is about 427.8881141871. Note that the first 3 decimals are identical.

The spelling of 78341281 in words is "seventy-eight million, three hundred forty-one thousand, two hundred eighty-one".