10872821 has 4 divisors (see below), whose sum is σ = 10896000. Its totient is φ = 10849644.

The previous prime is 10872817. The next prime is 10872833. The reversal of 10872821 is 12827801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12827801 = 7 ⋅1832543.

It is a cyclic number.

It is not a de Polignac number, because 10872821 - 2² = 10872817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10872881) 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, 10871 + ... + 11828.

It is an arithmetic number, because the mean of its divisors is an integer number (2724000).

Almost surely, 2^10872821 is an apocalyptic number.

It is an amenable number.

10872821 is a deficient number, since it is larger than the sum of its proper divisors (23179).

10872821 is an equidigital number, since it uses as much as digits as its factorization.

10872821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23178.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 10872821 is about 3297.3960938898. The cubic root of 10872821 is about 221.5375827740.

The spelling of 10872821 in words is "ten million, eight hundred seventy-two thousand, eight hundred twenty-one".