620105 has 4 divisors (see below), whose sum is σ = 744132. Its totient is φ = 496080.

The previous prime is 620099. The next prime is 620111. The reversal of 620105 is 501026.

620105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (620099) and next prime (620111).

It can be written as a sum of positive squares in 2 ways, for example, as 436921 + 183184 = 661^2 + 428^2 .

It is not a de Polignac number, because 620105 - 2^{8} = 619849 is a prime.

It is a super-2 number, since 2×620105^{2} = 769060422050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is a self number, because there is not a number *n* which added to its sum of digits gives 620105.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 620105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62006 + ... + 62015.

It is an arithmetic number, because the mean of its divisors is an integer number (186033).

2^{620105} is an apocalyptic number.

It is an amenable number.

620105 is a deficient number, since it is larger than the sum of its proper divisors (124027).

620105 is a wasteful number, since it uses less digits than its factorization.

620105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124026.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 620105 is about 787.4674596452. The cubic root of 620105 is about 85.2750032009.

The spelling of 620105 in words is "six hundred twenty thousand, one hundred five".

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