74478249 has 12 divisors (see below), whose sum is σ = 108690036. Its totient is φ = 49139712.

The previous prime is 74478247. The next prime is 74478251. The reversal of 74478249 is 94287447.

It is an interprime number because it is at equal distance from previous prime (74478247) and next prime (74478251).

It can be written as a sum of positive squares in 2 ways, for example, as 60840000 + 13638249 = 7800^2 + 3693^2 .

It is not a de Polignac number, because 74478249 - 2¹ = 74478247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74478247) 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, 41784 + ... + 43529.

It is an arithmetic number, because the mean of its divisors is an integer number (9057503).

Almost surely, 2^74478249 is an apocalyptic number.

It is an amenable number.

74478249 is a deficient number, since it is larger than the sum of its proper divisors (34211787).

74478249 is a wasteful number, since it uses less digits than its factorization.

74478249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85416 (or 85413 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 74478249 is about 8630.0781572359. The cubic root of 74478249 is about 420.7361409725.

The spelling of 74478249 in words is "seventy-four million, four hundred seventy-eight thousand, two hundred forty-nine".