724946 has 4 divisors (see below), whose sum is σ = 1087422. Its totient is φ = 362472.

The previous prime is 724939. The next prime is 724949. The reversal of 724946 is 649427.

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

It can be written as a sum of positive squares in only one way, i.e., 703921 + 21025 = 839^2 + 145^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (724949) by changing a digit.

724946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 181235 + ... + 181238.

2⁷²⁴⁹⁴⁶ is an apocalyptic number.

724946 is a deficient number, since it is larger than the sum of its proper divisors (362476).

724946 is a wasteful number, since it uses less digits than its factorization.

724946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362475.

The product of its digits is 12096, while the sum is 32.

The square root of 724946 is about 851.4376078140. The cubic root of 724946 is about 89.8328585134.

The spelling of 724946 in words is "seven hundred twenty-four thousand, nine hundred forty-six".