78412 has 6 divisors (see below), whose sum is σ = 137228. Its totient is φ = 39204.

The previous prime is 78401. The next prime is 78427. The reversal of 78412 is 21487.

It is a super-2 number, since 2×78412² = 12296883488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9798 + ... + 9805.

2⁷⁸⁴¹² is an apocalyptic number.

It is an amenable number.

78412 is a deficient number, since it is larger than the sum of its proper divisors (58816).

78412 is a wasteful number, since it uses less digits than its factorization.

78412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19607 (or 19605 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 78412 is about 280.0214277515. The cubic root of 78412 is about 42.8016827591.

Adding to 78412 its reverse (21487), we get a palindrome (99899).

The spelling of 78412 in words is "seventy-eight thousand, four hundred twelve".