721206049 has 8 divisors (see below), whose sum is σ = 729660800. Its totient is φ = 712800000.

The previous prime is 721206043. The next prime is 721206053. The reversal of 721206049 is 940602127.

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 721206049 - 2²⁵ = 687651617 is a prime.

It is a super-2 number, since 2×721206049² = 1040276330228380802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 721206049.

It is not an unprimeable number, because it can be changed into a prime (721206043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18049 + ... + 42049.

It is an arithmetic number, because the mean of its divisors is an integer number (91207600).

Almost surely, 2^721206049 is an apocalyptic number.

It is an amenable number.

721206049 is a deficient number, since it is larger than the sum of its proper divisors (8454751).

721206049 is a wasteful number, since it uses less digits than its factorization.

721206049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24351.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 721206049 is about 26855.2797229893. The cubic root of 721206049 is about 896.7811140077.

The spelling of 721206049 in words is "seven hundred twenty-one million, two hundred six thousand, forty-nine".