2161007 has 2 divisors, whose sum is σ = 2161008. Its totient is φ = 2161006.

The previous prime is 2161001. The next prime is 2161031. The reversal of 2161007 is 7001612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161007 - 2¹⁸ = 1898863 is a prime.

It is a Chen prime.

It is an Ulam number.

It is equal to p₁₆₀₀₂₈ and since 2161007 and 160028 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161001) 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 as a sum of consecutive naturals, namely, 1080503 + 1080504.

It is an arithmetic number, because the mean of its divisors is an integer number (1080504).

2^2161007 is an apocalyptic number.

2161007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161007 is an equidigital number, since it uses as much as digits as its factorization.

2161007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 2161007 is about 1470.0363941073. The cubic root of 2161007 is about 129.2861663896.

Adding to 2161007 its reverse (7001612), we get a palindrome (9162619).

The spelling of 2161007 in words is "two million, one hundred sixty-one thousand, seven".