2142920681 has 8 divisors (see below), whose sum is σ = 2460770400. Its totient is φ = 1845577440.

The previous prime is 2142920677. The next prime is 2142920683. The reversal of 2142920681 is 1860292412.

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 2142920681 - 2² = 2142920677 is a prime.

It is a super-2 number, since 2×2142920681² = 9184218090115007522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2142920683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126396 + ... + 5126813.

It is an arithmetic number, because the mean of its divisors is an integer number (307596300).

Almost surely, 2^2142920681 is an apocalyptic number.

It is an amenable number.

2142920681 is a deficient number, since it is larger than the sum of its proper divisors (317849719).

2142920681 is a wasteful number, since it uses less digits than its factorization.

2142920681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253239.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 2142920681 is about 46291.6912739209. The cubic root of 2142920681 is about 1289.2447316599.

The spelling of 2142920681 in words is "two billion, one hundred forty-two million, nine hundred twenty thousand, six hundred eighty-one".