82142761 has 4 divisors (see below), whose sum is σ = 84975300. Its totient is φ = 79310224.

The previous prime is 82142741. The next prime is 82142779. The reversal of 82142761 is 16724128.

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 33408400 + 48734361 = 5780^2 + 6981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82142761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82142741) 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, 1416226 + ... + 1416283.

It is an arithmetic number, because the mean of its divisors is an integer number (21243825).

Almost surely, 2^82142761 is an apocalyptic number.

It is an amenable number.

82142761 is a deficient number, since it is larger than the sum of its proper divisors (2832539).

82142761 is a wasteful number, since it uses less digits than its factorization.

82142761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832538.

The product of its digits is 5376, while the sum is 31.

The square root of 82142761 is about 9063.2643677651. The cubic root of 82142761 is about 434.7001253800.

Adding to 82142761 its reverse (16724128), we get a palindrome (98866889).

The spelling of 82142761 in words is "eighty-two million, one hundred forty-two thousand, seven hundred sixty-one".