74651249 has 4 divisors (see below), whose sum is σ = 77225460. Its totient is φ = 72077040.

The previous prime is 74651243. The next prime is 74651309. The reversal of 74651249 is 94215647.

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 11607649 + 63043600 = 3407^2 + 7940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74651249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74651243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287062 + ... + 1287119.

It is an arithmetic number, because the mean of its divisors is an integer number (19306365).

Almost surely, 2^74651249 is an apocalyptic number.

It is an amenable number.

74651249 is a deficient number, since it is larger than the sum of its proper divisors (2574211).

74651249 is a wasteful number, since it uses less digits than its factorization.

74651249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574210.

The product of its digits is 60480, while the sum is 38.

The square root of 74651249 is about 8640.0954277137. The cubic root of 74651249 is about 421.0616546561.

The spelling of 74651249 in words is "seventy-four million, six hundred fifty-one thousand, two hundred forty-nine".