620715 has 8 divisors (see below), whose sum is σ = 993168. Its totient is φ = 331040.

The previous prime is 620693. The next prime is 620717. The reversal of 620715 is 517026.

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

It is not a de Polignac number, because 620715 - 2¹⁵ = 587947 is a prime.

It is a super-2 number, since 2×620715² = 770574222450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620691 and 620700.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620715.

It is not an unprimeable number, because it can be changed into a prime (620717) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20676 + ... + 20705.

It is an arithmetic number, because the mean of its divisors is an integer number (124146).

2⁶²⁰⁷¹⁵ is an apocalyptic number.

620715 is a deficient number, since it is larger than the sum of its proper divisors (372453).

620715 is a wasteful number, since it uses less digits than its factorization.

620715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41389.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 620715 is about 787.8546820322. The cubic root of 620715 is about 85.3029558350.

The spelling of 620715 in words is "six hundred twenty thousand, seven hundred fifteen".