721433461 has 8 divisors (see below), whose sum is σ = 825858560. Its totient is φ = 617349168.

The previous prime is 721433443. The next prime is 721433497. The reversal of 721433461 is 164334127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721433461 - 2⁵ = 721433429 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 (721433431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80646 + ... + 89143.

It is an arithmetic number, because the mean of its divisors is an integer number (103232320).

Almost surely, 2^721433461 is an apocalyptic number.

It is an amenable number.

721433461 is a deficient number, since it is larger than the sum of its proper divisors (104425099).

721433461 is a wasteful number, since it uses less digits than its factorization.

721433461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170403.

The product of its digits is 12096, while the sum is 31.

The square root of 721433461 is about 26859.5134170372. The cubic root of 721433461 is about 896.8753623182.

Adding to 721433461 its reverse (164334127), we get a palindrome (885767588).

The spelling of 721433461 in words is "seven hundred twenty-one million, four hundred thirty-three thousand, four hundred sixty-one".