82125807 has 4 divisors (see below), whose sum is σ = 109501080. Its totient is φ = 54750536.

The previous prime is 82125781. The next prime is 82125821. The reversal of 82125807 is 70852128.

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

It is a cyclic number.

It is not a de Polignac number, because 82125807 - 2⁷ = 82125679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82125887) 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, 13687632 + ... + 13687637.

It is an arithmetic number, because the mean of its divisors is an integer number (27375270).

Almost surely, 2^82125807 is an apocalyptic number.

82125807 is a deficient number, since it is larger than the sum of its proper divisors (27375273).

82125807 is a wasteful number, since it uses less digits than its factorization.

82125807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27375272.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 82125807 is about 9062.3290052834. The cubic root of 82125807 is about 434.6702164226.

The spelling of 82125807 in words is "eighty-two million, one hundred twenty-five thousand, eight hundred seven".