620742 has 8 divisors (see below), whose sum is σ = 1241496. Its totient is φ = 206912.

The previous prime is 620731. The next prime is 620743. The reversal of 620742 is 247026.

It is a happy number.

620742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

620742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620743) by changing a digit.

620742 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 in 3 ways as a sum of consecutive naturals, for example, 51723 + ... + 51734.

It is an arithmetic number, because the mean of its divisors is an integer number (155187).

2⁶²⁰⁷⁴² is an apocalyptic number.

620742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620742 is a wasteful number, since it uses less digits than its factorization.

620742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103462.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 620742 is about 787.8718169855. The cubic root of 620742 is about 85.3041926594.

Adding to 620742 its reverse (247026), we get a palindrome (867768).

The spelling of 620742 in words is "six hundred twenty thousand, seven hundred forty-two".