820125854 has 8 divisors (see below), whose sum is σ = 1239039480. Its totient is φ = 407112696.

The previous prime is 820125853. The next prime is 820125857. The reversal of 820125854 is 458521028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820125853) 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, 1474769 + ... + 1475324.

It is an arithmetic number, because the mean of its divisors is an integer number (154879935).

Almost surely, 2^820125854 is an apocalyptic number.

820125854 is a deficient number, since it is larger than the sum of its proper divisors (418913626).

820125854 is a wasteful number, since it uses less digits than its factorization.

820125854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950234.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 820125854 is about 28637.8395484017. The cubic root of 820125854 is about 936.0380452734.

The spelling of 820125854 in words is "eight hundred twenty million, one hundred twenty-five thousand, eight hundred fifty-four".