825872421 has 8 divisors (see below), whose sum is σ = 1201269024. Its totient is φ = 500528720.

The previous prime is 825872407. The next prime is 825872423. The reversal of 825872421 is 124278528.

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

It is a cyclic number.

It is not a de Polignac number, because 825872421 - 2¹¹ = 825870373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 825872421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825872423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12513186 + ... + 12513251.

It is an arithmetic number, because the mean of its divisors is an integer number (150158628).

Almost surely, 2^825872421 is an apocalyptic number.

It is an amenable number.

825872421 is a deficient number, since it is larger than the sum of its proper divisors (375396603).

825872421 is a wasteful number, since it uses less digits than its factorization.

825872421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25026451.

The product of its digits is 71680, while the sum is 39.

The square root of 825872421 is about 28737.9961201194. The cubic root of 825872421 is about 938.2192107417.

The spelling of 825872421 in words is "eight hundred twenty-five million, eight hundred seventy-two thousand, four hundred twenty-one".