620915 has 4 divisors (see below), whose sum is σ = 745104. Its totient is φ = 496728.

The previous prime is 620911. The next prime is 620929. The reversal of 620915 is 519026.

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

It is a cyclic number.

It is not a de Polignac number, because 620915 - 2² = 620911 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620915.

It is not an unprimeable number, because it can be changed into a prime (620911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62087 + ... + 62096.

It is an arithmetic number, because the mean of its divisors is an integer number (186276).

2⁶²⁰⁹¹⁵ is an apocalyptic number.

620915 is a deficient number, since it is larger than the sum of its proper divisors (124189).

620915 is a wasteful number, since it uses less digits than its factorization.

620915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124188.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 620915 is about 787.9815987699. The cubic root of 620915 is about 85.3121166464.

The spelling of 620915 in words is "six hundred twenty thousand, nine hundred fifteen".