2618021 has 18 divisors (see below), whose sum is σ = 3215142. Its totient is φ = 2125200.

The previous prime is 2618003. The next prime is 2618023. The reversal of 2618021 is 1208162.

It can be written as a sum of positive squares in only one way, i.e., 2592100 + 25921 = 1610^2 + 161^2 .

It is not a de Polignac number, because 2618021 - 2⁶ = 2617957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2617984 and 2618002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2618023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25871 + ... + 25971.

It is an arithmetic number, because the mean of its divisors is an integer number (178619).

2^2618021 is an apocalyptic number.

It is an amenable number.

2618021 is a deficient number, since it is larger than the sum of its proper divisors (597121).

2618021 is a wasteful number, since it uses less digits than its factorization.

2618021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 131 counting only the distinct ones).

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

The square root of 2618021 is about 1618.0299750005. The cubic root of 2618021 is about 137.8238493215.

The spelling of 2618021 in words is "two million, six hundred eighteen thousand, twenty-one".