2506217 has 4 divisors (see below), whose sum is σ = 2864256. Its totient is φ = 2148180.

The previous prime is 2506201. The next prime is 2506223. The reversal of 2506217 is 7126052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2506217 - 2⁴ = 2506201 is a prime.

It is a super-2 number, since 2×2506217² = 12562247302178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2506192 and 2506201.

It is not an unprimeable number, because it can be changed into a prime (2506277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179009 + ... + 179022.

It is an arithmetic number, because the mean of its divisors is an integer number (716064).

2^2506217 is an apocalyptic number.

It is an amenable number.

2506217 is a deficient number, since it is larger than the sum of its proper divisors (358039).

2506217 is an equidigital number, since it uses as much as digits as its factorization.

2506217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358038.

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

The square root of 2506217 is about 1583.1035973682. The cubic root of 2506217 is about 135.8332912626.

The spelling of 2506217 in words is "two million, five hundred six thousand, two hundred seventeen".