620247 has 4 divisors (see below), whose sum is σ = 827000. Its totient is φ = 413496.

The previous prime is 620239. The next prime is 620251. The reversal of 620247 is 742026.

It is a happy number.

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

It is not a de Polignac number, because 620247 - 2³ = 620239 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103372 + ... + 103377.

It is an arithmetic number, because the mean of its divisors is an integer number (206750).

2⁶²⁰²⁴⁷ is an apocalyptic number.

620247 is a deficient number, since it is larger than the sum of its proper divisors (206753).

620247 is a wasteful number, since it uses less digits than its factorization.

620247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206752.

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

The square root of 620247 is about 787.5576169399. The cubic root of 620247 is about 85.2815118439.

The spelling of 620247 in words is "six hundred twenty thousand, two hundred forty-seven".