10821619 has 4 divisors (see below), whose sum is σ = 10831360. Its totient is φ = 10811880.

The previous prime is 10821589. The next prime is 10821631. The reversal of 10821619 is 91612801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10821619 - 2⁷ = 10821491 is a prime.

It is a super-2 number, since 2×10821619² = 234214875562322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10821689) 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, 2952 + ... + 5509.

It is an arithmetic number, because the mean of its divisors is an integer number (2707840).

Almost surely, 2^10821619 is an apocalyptic number.

10821619 is a deficient number, since it is larger than the sum of its proper divisors (9741).

10821619 is an equidigital number, since it uses as much as digits as its factorization.

10821619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 10821619 is about 3289.6229267197. The cubic root of 10821619 is about 221.1892824973.

It can be divided in two parts, 1082 and 1619, that added together give a triangular number (2701 = T₇₃).

The spelling of 10821619 in words is "ten million, eight hundred twenty-one thousand, six hundred nineteen".