867261021 has 8 divisors (see below), whose sum is σ = 1261470624. Its totient is φ = 525612720.

The previous prime is 867260983. The next prime is 867261041. The reversal of 867261021 is 120162768.

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

It is a de Polignac number, because none of the positive numbers 2^k-867261021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 26280637 = 867261021 / (8 + 6 + 7 + 2 + 6 + 1 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867261041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13140286 + ... + 13140351.

It is an arithmetic number, because the mean of its divisors is an integer number (157683828).

Almost surely, 2^867261021 is an apocalyptic number.

It is an amenable number.

867261021 is a deficient number, since it is larger than the sum of its proper divisors (394209603).

867261021 is a wasteful number, since it uses less digits than its factorization.

867261021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26280651.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 867261021 is about 29449.2957640756. The cubic root of 867261021 is about 953.6374018108.

The spelling of 867261021 in words is "eight hundred sixty-seven million, two hundred sixty-one thousand, twenty-one".