78612201 has 12 divisors (see below), whose sum is σ = 117756912. Its totient is φ = 52407972.

The previous prime is 78612173. The next prime is 78612203. The reversal of 78612201 is 10221687.

It is not a de Polignac number, because 78612201 - 2¹⁴ = 78595817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (78612203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161511 + ... + 161996.

It is an arithmetic number, because the mean of its divisors is an integer number (9813076).

Almost surely, 2^78612201 is an apocalyptic number.

It is an amenable number.

78612201 is a deficient number, since it is larger than the sum of its proper divisors (39144711).

78612201 is an equidigital number, since it uses as much as digits as its factorization.

78612201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323522 (or 323510 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 78612201 is about 8866.3521811397. The cubic root of 78612201 is about 428.3807879245.

Adding to 78612201 its reverse (10221687), we get a palindrome (88833888).

The spelling of 78612201 in words is "seventy-eight million, six hundred twelve thousand, two hundred one".