872584421 has 8 divisors (see below), whose sum is σ = 891287064. Its totient is φ = 853964800.

The previous prime is 872584417. The next prime is 872584429. The reversal of 872584421 is 124485278.

It can be written as a sum of positive squares in 4 ways, for example, as 290327521 + 582256900 = 17039^2 + 24130^2 .

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 872584421 - 2² = 872584417 is a prime.

It is a super-2 number, since 2×872584421² = 1522807143543810482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872584429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725 + ... + 41781.

It is an arithmetic number, because the mean of its divisors is an integer number (111410883).

Almost surely, 2^872584421 is an apocalyptic number.

It is an amenable number.

872584421 is a deficient number, since it is larger than the sum of its proper divisors (18702643).

872584421 is a wasteful number, since it uses less digits than its factorization.

872584421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41511.

The product of its digits is 143360, while the sum is 41.

The square root of 872584421 is about 29539.5399591801. The cubic root of 872584421 is about 955.5846208879.

The spelling of 872584421 in words is "eight hundred seventy-two million, five hundred eighty-four thousand, four hundred twenty-one".