78271275 has 12 divisors (see below), whose sum is σ = 129408632. Its totient is φ = 41744640.

The previous prime is 78271267. The next prime is 78271331. The reversal of 78271275 is 57217287.

It is not a de Polignac number, because 78271275 - 2³ = 78271267 is a prime.

It is a super-2 number, since 2×78271275² = 12252784980251250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521734 + ... + 521883.

Almost surely, 2^78271275 is an apocalyptic number.

78271275 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78271275 is a deficient number, since it is larger than the sum of its proper divisors (51137357).

78271275 is a wasteful number, since it uses less digits than its factorization.

78271275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043630 (or 1043625 counting only the distinct ones).

The product of its digits is 54880, while the sum is 39.

The square root of 78271275 is about 8847.1054588492. The cubic root of 78271275 is about 427.7606221764.

The spelling of 78271275 in words is "seventy-eight million, two hundred seventy-one thousand, two hundred seventy-five".