620145 has 12 divisors (see below), whose sum is σ = 1074996. Its totient is φ = 330720.

The previous prime is 620117. The next prime is 620159. The reversal of 620145 is 541026.

It is a happy number.

620145 is a `hidden beast` number, since 620 + 1 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 331776 = 537^2 + 576^2 .

It is not a de Polignac number, because 620145 - 2¹³ = 611953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6846 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (89583).

2⁶²⁰¹⁴⁵ is an apocalyptic number.

It is an amenable number.

620145 is a deficient number, since it is larger than the sum of its proper divisors (454851).

620145 is a wasteful number, since it uses less digits than its factorization.

620145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792 (or 13789 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 620145 is about 787.4928571105. The cubic root of 620145 is about 85.2768367219.

The spelling of 620145 in words is "six hundred twenty thousand, one hundred forty-five".