74678245 has 4 divisors (see below), whose sum is σ = 89613900. Its totient is φ = 59742592.

The previous prime is 74678239. The next prime is 74678249. The reversal of 74678245 is 54287647.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32285124 + 42393121 = 5682^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 74678245 - 2³ = 74678237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74678249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7467820 + ... + 7467829.

It is an arithmetic number, because the mean of its divisors is an integer number (22403475).

Almost surely, 2^74678245 is an apocalyptic number.

It is an amenable number.

74678245 is a deficient number, since it is larger than the sum of its proper divisors (14935655).

74678245 is a wasteful number, since it uses less digits than its factorization.

74678245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14935654.

The product of its digits is 376320, while the sum is 43.

The square root of 74678245 is about 8641.6575377644. The cubic root of 74678245 is about 421.1124044679.

The spelling of 74678245 in words is "seventy-four million, six hundred seventy-eight thousand, two hundred forty-five".