620745 has 16 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 319424.

The previous prime is 620743. The next prime is 620759. The reversal of 620745 is 547026.

It is a happy number.

620745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 620745 - 2¹ = 620743 is a prime.

It is a Curzon number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2⁶²⁰⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

620745 is a deficient number, since it is larger than the sum of its proper divisors (407415).

620745 is a wasteful number, since it uses less digits than its factorization.

620745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 620745 is about 787.8737208462. The cubic root of 620745 is about 85.3043300821.

The spelling of 620745 in words is "six hundred twenty thousand, seven hundred forty-five".