78101285 has 8 divisors (see below), whose sum is σ = 93789816. Its totient is φ = 62435520.

The previous prime is 78101279. The next prime is 78101291. The reversal of 78101285 is 58210187.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78101279) and next prime (78101291).

It can be written as a sum of positive squares in 4 ways, for example, as 1240996 + 76860289 = 1114^2 + 8767^2 .

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

It is not a de Polignac number, because 78101285 - 2¹⁴ = 78084901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3095 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (11723727).

Almost surely, 2^78101285 is an apocalyptic number.

It is an amenable number.

78101285 is a deficient number, since it is larger than the sum of its proper divisors (15688531).

78101285 is a wasteful number, since it uses less digits than its factorization.

78101285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 78101285 is about 8837.4931400256. The cubic root of 78101285 is about 427.4507267401.

The spelling of 78101285 in words is "seventy-eight million, one hundred one thousand, two hundred eighty-five".