2142517 has 4 divisors (see below), whose sum is σ = 2307340. Its totient is φ = 1977696.

The previous prime is 2142499. The next prime is 2142521. The reversal of 2142517 is 7152412.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1343281 + 799236 = 1159^2 + 894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142517 is a prime.

It is a Duffinian number.

2142517 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142557) 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, 82392 + ... + 82417.

It is an arithmetic number, because the mean of its divisors is an integer number (576835).

2^2142517 is an apocalyptic number.

It is an amenable number.

2142517 is a deficient number, since it is larger than the sum of its proper divisors (164823).

2142517 is a wasteful number, since it uses less digits than its factorization.

2142517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164822.

The product of its digits is 560, while the sum is 22.

The square root of 2142517 is about 1463.7339239083. The cubic root of 2142517 is about 128.9163771083.

Adding to 2142517 its reverse (7152412), we get a palindrome (9294929).

The spelling of 2142517 in words is "two million, one hundred forty-two thousand, five hundred seventeen".