74720247 has 12 divisors (see below), whose sum is σ = 115892856. Its totient is φ = 42697200.

The previous prime is 74720237. The next prime is 74720249. The reversal of 74720247 is 74202747.

It is not a de Polignac number, because 74720247 - 2⁶ = 74720183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74720249) 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, 254004 + ... + 254297.

It is an arithmetic number, because the mean of its divisors is an integer number (9657738).

Almost surely, 2^74720247 is an apocalyptic number.

74720247 is a deficient number, since it is larger than the sum of its proper divisors (41172609).

74720247 is a wasteful number, since it uses less digits than its factorization.

74720247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508318 (or 508311 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 33.

The square root of 74720247 is about 8644.0874012240. The cubic root of 74720247 is about 421.1913397642.

The spelling of 74720247 in words is "seventy-four million, seven hundred twenty thousand, two hundred forty-seven".