1020867681 has 8 divisors (see below), whose sum is σ = 1364486560. Its totient is φ = 678913632.

The previous prime is 1020867671. The next prime is 1020867761. The reversal of 1020867681 is 1867680201.

1020867681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1020867681 - 2⁷ = 1020867553 is a prime.

It is a super-2 number, since 2×1020867681² = 2084341644220635522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020867611) 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, 414775 + ... + 417228.

It is an arithmetic number, because the mean of its divisors is an integer number (170560820).

Almost surely, 2^1020867681 is an apocalyptic number.

It is an amenable number.

1020867681 is a deficient number, since it is larger than the sum of its proper divisors (343618879).

1020867681 is an equidigital number, since it uses as much as digits as its factorization.

1020867681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832415.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 1020867681 is about 31951.0200306657. The cubic root of 1020867681 is about 1006.9080624525.

The spelling of 1020867681 in words is "one billion, twenty million, eight hundred sixty-seven thousand, six hundred eighty-one".