625217 has 4 divisors (see below), whose sum is σ = 626820. Its totient is φ = 623616.

The previous prime is 625213. The next prime is 625231. The reversal of 625217 is 712526.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 712526 = 2 ⋅356263.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 541696 = 289^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 625217 - 2² = 625213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625192 and 625201.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625217.

It is not an unprimeable number, because it can be changed into a prime (625213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (156705).

2⁶²⁵²¹⁷ is an apocalyptic number.

It is an amenable number.

625217 is a deficient number, since it is larger than the sum of its proper divisors (1603).

625217 is an equidigital number, since it uses as much as digits as its factorization.

625217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602.

The product of its digits is 840, while the sum is 23.

The square root of 625217 is about 790.7066459819. The cubic root of 625217 is about 85.5086912497.

The spelling of 625217 in words is "six hundred twenty-five thousand, two hundred seventeen".