722146 has 8 divisors (see below), whose sum is σ = 1095660. Its totient is φ = 356928.

The previous prime is 722123. The next prime is 722147. The reversal of 722146 is 641227.

It can be written as a sum of positive squares in 2 ways, for example, as 703921 + 18225 = 839^2 + 135^2 .

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

It is not an unprimeable number, because it can be changed into a prime (722147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851 + ... + 2206.

2⁷²²¹⁴⁶ is an apocalyptic number.

722146 is a deficient number, since it is larger than the sum of its proper divisors (373514).

722146 is a wasteful number, since it uses less digits than its factorization.

722146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148.

The product of its digits is 672, while the sum is 22.

The square root of 722146 is about 849.7917391926. The cubic root of 722146 is about 89.7170537794.

It can be divided in two parts, 722 and 146, that added together give a palindrome (868).

The spelling of 722146 in words is "seven hundred twenty-two thousand, one hundred forty-six".