721341106 has 4 divisors (see below), whose sum is σ = 1082011662. Its totient is φ = 360670552.

The previous prime is 721341083. The next prime is 721341109. The reversal of 721341106 is 601143127.

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., 446941881 + 274399225 = 21141^2 + 16565^2 .

It is not an unprimeable number, because it can be changed into a prime (721341109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180335275 + ... + 180335278.

Almost surely, 2^721341106 is an apocalyptic number.

721341106 is a deficient number, since it is larger than the sum of its proper divisors (360670556).

721341106 is a wasteful number, since it uses less digits than its factorization.

721341106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360670555.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 721341106 is about 26857.7941387598. The cubic root of 721341106 is about 896.8370892303.

The spelling of 721341106 in words is "seven hundred twenty-one million, three hundred forty-one thousand, one hundred six".