622742 has 4 divisors (see below), whose sum is σ = 934116. Its totient is φ = 311370.

The previous prime is 622729. The next prime is 622751. The reversal of 622742 is 247226.

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

It is a congruent number.

It is an unprimeable number.

622742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155684 + ... + 155687.

It is an arithmetic number, because the mean of its divisors is an integer number (233529).

2⁶²²⁷⁴² is an apocalyptic number.

622742 is a deficient number, since it is larger than the sum of its proper divisors (311374).

622742 is a wasteful number, since it uses less digits than its factorization.

622742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311373.

The product of its digits is 1344, while the sum is 23.

The square root of 622742 is about 789.1400382695. The cubic root of 622742 is about 85.3957097374.

Adding to 622742 its reverse (247226), we get a palindrome (869968).

The spelling of 622742 in words is "six hundred twenty-two thousand, seven hundred forty-two".