742724 has 6 divisors (see below), whose sum is σ = 1299774. Its totient is φ = 371360.

The previous prime is 742723. The next prime is 742757. The reversal of 742724 is 427247.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 53824 = 830^2 + 232^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 742693 and 742702.

It is not an unprimeable number, because it can be changed into a prime (742723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92837 + ... + 92844.

It is an arithmetic number, because the mean of its divisors is an integer number (216629).

2⁷⁴²⁷²⁴ is an apocalyptic number.

It is an amenable number.

742724 is a deficient number, since it is larger than the sum of its proper divisors (557050).

742724 is a wasteful number, since it uses less digits than its factorization.

742724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185685 (or 185683 counting only the distinct ones).

The product of its digits is 3136, while the sum is 26.

The square root of 742724 is about 861.8143651622. The cubic root of 742724 is about 90.5612661674.

The spelling of 742724 in words is "seven hundred forty-two thousand, seven hundred twenty-four", and thus it is an iban number.