721124606 has 4 divisors (see below), whose sum is σ = 1081686912. Its totient is φ = 360562302.

The previous prime is 721124557. The next prime is 721124611. The reversal of 721124606 is 606421127.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180281150 + ... + 180281153.

It is an arithmetic number, because the mean of its divisors is an integer number (270421728).

Almost surely, 2^721124606 is an apocalyptic number.

721124606 is a deficient number, since it is larger than the sum of its proper divisors (360562306).

721124606 is a wasteful number, since it uses less digits than its factorization.

721124606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360562305.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 721124606 is about 26853.7633489237. The cubic root of 721124606 is about 896.7473560667.

The spelling of 721124606 in words is "seven hundred twenty-one million, one hundred twenty-four thousand, six hundred six".