620722 has 4 divisors (see below), whose sum is σ = 931086. Its totient is φ = 310360.

The previous prime is 620717. The next prime is 620731. The reversal of 620722 is 227026.

It is a happy number.

620722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227026 = 2 ⋅113513.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 271441 = 591^2 + 521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 620722.

It is an unprimeable number.

620722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155179 + ... + 155182.

2⁶²⁰⁷²² is an apocalyptic number.

620722 is a deficient number, since it is larger than the sum of its proper divisors (310364).

620722 is a wasteful number, since it uses less digits than its factorization.

620722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310363.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 620722 is about 787.8591244633. The cubic root of 620722 is about 85.3032764966.

Adding to 620722 its reverse (227026), we get a palindrome (847748).

The spelling of 620722 in words is "six hundred twenty thousand, seven hundred twenty-two".