78414145 has 4 divisors (see below), whose sum is σ = 94096980. Its totient is φ = 62731312.

The previous prime is 78414139. The next prime is 78414151. The reversal of 78414145 is 54141487.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78414139) and next prime (78414151).

It can be written as a sum of positive squares in 2 ways, for example, as 59413264 + 19000881 = 7708^2 + 4359^2 .

It is a cyclic number.

It is not a de Polignac number, because 78414145 - 2⁵ = 78414113 is a prime.

It is a super-2 number, since 2×78414145² = 12297556272162050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78414145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7841410 + ... + 7841419.

It is an arithmetic number, because the mean of its divisors is an integer number (23524245).

Almost surely, 2^78414145 is an apocalyptic number.

It is an amenable number.

78414145 is a deficient number, since it is larger than the sum of its proper divisors (15682835).

78414145 is a wasteful number, since it uses less digits than its factorization.

78414145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15682834.

The product of its digits is 17920, while the sum is 34.

The square root of 78414145 is about 8855.1761699020. The cubic root of 78414145 is about 428.0207304280.

The spelling of 78414145 in words is "seventy-eight million, four hundred fourteen thousand, one hundred forty-five".