74247 has 4 divisors (see below), whose sum is σ = 99000. Its totient is φ = 49496.

The previous prime is 74231. The next prime is 74257.

74247 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 74247 - 2⁴ = 74231 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74257) 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, 12372 + ... + 12377.

It is an arithmetic number, because the mean of its divisors is an integer number (24750).

2⁷⁴²⁴⁷ is an apocalyptic number.

74247 is a deficient number, since it is larger than the sum of its proper divisors (24753).

74247 is a wasteful number, since it uses less digits than its factorization.

74247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24752.

The product of its digits is 1568, while the sum is 24.

The square root of 74247 is about 272.4830269943. The cubic root of 74247 is about 42.0300238837.

The spelling of 74247 in words is "seventy-four thousand, two hundred forty-seven", and thus it is an iban number.