82125140 has 24 divisors (see below), whose sum is σ = 172671072. Its totient is φ = 32810400.

The previous prime is 82125139. The next prime is 82125193. The reversal of 82125140 is 4152128.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 19067 + ... + 22973.

It is an arithmetic number, because the mean of its divisors is an integer number (7194628).

Almost surely, 2^82125140 is an apocalyptic number.

It is an amenable number.

82125140 is an abundant number, since it is smaller than the sum of its proper divisors (90545932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82125140 is a wasteful number, since it uses less digits than its factorization.

82125140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967 (or 4965 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 82125140 is about 9062.2922045143. The cubic root of 82125140 is about 434.6690396678.

Adding to 82125140 its reverse (4152128), we get a palindrome (86277268).

The spelling of 82125140 in words is "eighty-two million, one hundred twenty-five thousand, one hundred forty".