742447 has 4 divisors (see below), whose sum is σ = 752976. Its totient is φ = 731920.

The previous prime is 742439. The next prime is 742457. The reversal of 742447 is 744247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744247 = 7 ⋅106321.

It is a cyclic number.

It is not a de Polignac number, because 742447 - 2³ = 742439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5158 + ... + 5299.

It is an arithmetic number, because the mean of its divisors is an integer number (188244).

2⁷⁴²⁴⁴⁷ is an apocalyptic number.

742447 is a deficient number, since it is larger than the sum of its proper divisors (10529).

742447 is a wasteful number, since it uses less digits than its factorization.

742447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10528.

The product of its digits is 6272, while the sum is 28.

The square root of 742447 is about 861.6536427127. The cubic root of 742447 is about 90.5500064487.

The spelling of 742447 in words is "seven hundred forty-two thousand, four hundred forty-seven", and thus it is an iban number.