82415642 has 4 divisors (see below), whose sum is σ = 123623466. Its totient is φ = 41207820.

The previous prime is 82415633. The next prime is 82415657. The reversal of 82415642 is 24651428.

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

It can be written as a sum of positive squares in only one way, i.e., 62425801 + 19989841 = 7901^2 + 4471^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82415599 and 82415608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20603909 + ... + 20603912.

Almost surely, 2^82415642 is an apocalyptic number.

82415642 is a deficient number, since it is larger than the sum of its proper divisors (41207824).

82415642 is a wasteful number, since it uses less digits than its factorization.

82415642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41207823.

The product of its digits is 15360, while the sum is 32.

The square root of 82415642 is about 9078.3061195357. The cubic root of 82415642 is about 435.1809561134.

The spelling of 82415642 in words is "eighty-two million, four hundred fifteen thousand, six hundred forty-two".