820492125 has 16 divisors (see below), whose sum is σ = 1365299520. Its totient is φ = 437595600.

The previous prime is 820492121. The next prime is 820492139. The reversal of 820492125 is 521294028.

It is not a de Polignac number, because 820492125 - 2² = 820492121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820492121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093615 + ... + 1094364.

It is an arithmetic number, because the mean of its divisors is an integer number (85331220).

Almost surely, 2^820492125 is an apocalyptic number.

It is an amenable number.

820492125 is a deficient number, since it is larger than the sum of its proper divisors (544807395).

820492125 is a wasteful number, since it uses less digits than its factorization.

820492125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187997 (or 2187987 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 820492125 is about 28644.2337129133. The cubic root of 820492125 is about 936.1773704609.

The spelling of 820492125 in words is "eight hundred twenty million, four hundred ninety-two thousand, one hundred twenty-five".