2861021 has 8 divisors (see below), whose sum is σ = 3026688. Its totient is φ = 2700000.

The previous prime is 2861009. The next prime is 2861041. The reversal of 2861021 is 1201682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2861021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2860984 and 2861002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861041) 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, 146 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (378336).

2^2861021 is an apocalyptic number.

It is an amenable number.

2861021 is a deficient number, since it is larger than the sum of its proper divisors (165667).

2861021 is a wasteful number, since it uses less digits than its factorization.

2861021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2861021 is about 1691.4552905708. The cubic root of 2861021 is about 141.9625140752.

The spelling of 2861021 in words is "two million, eight hundred sixty-one thousand, twenty-one".