1026864821 has 8 divisors (see below), whose sum is σ = 1088510400. Its totient is φ = 965357248.

The previous prime is 1026864781. The next prime is 1026864841. The reversal of 1026864821 is 1284686201.

It is a happy number.

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 1026864821 - 2¹⁴ = 1026848437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026864841) 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, 18971 + ... + 49128.

It is an arithmetic number, because the mean of its divisors is an integer number (136063800).

Almost surely, 2^1026864821 is an apocalyptic number.

It is an amenable number.

1026864821 is a deficient number, since it is larger than the sum of its proper divisors (61645579).

1026864821 is an equidigital number, since it uses as much as digits as its factorization.

1026864821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69003.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1026864821 is about 32044.7315638624. The cubic root of 1026864821 is about 1008.8759251974.

The spelling of 1026864821 in words is "one billion, twenty-six million, eight hundred sixty-four thousand, eight hundred twenty-one".