2571217 has 4 divisors (see below), whose sum is σ = 2804976. Its totient is φ = 2337460.

The previous prime is 2571209. The next prime is 2571269. The reversal of 2571217 is 7121752.

It is a happy number.

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 2571217 - 2³ = 2571209 is a prime.

It is a super-5 number, since 5×2571217⁵ (a number of 33 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2571191 and 2571200.

It is not an unprimeable number, because it can be changed into a prime (2571277) 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, 116863 + ... + 116884.

It is an arithmetic number, because the mean of its divisors is an integer number (701244).

2^2571217 is an apocalyptic number.

It is an amenable number.

2571217 is a deficient number, since it is larger than the sum of its proper divisors (233759).

2571217 is a wasteful number, since it uses less digits than its factorization.

2571217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233758.

The product of its digits is 980, while the sum is 25.

The square root of 2571217 is about 1603.5014811343. The cubic root of 2571217 is about 136.9975846272.

Adding to 2571217 its reverse (7121752), we get a palindrome (9692969).

The spelling of 2571217 in words is "two million, five hundred seventy-one thousand, two hundred seventeen".