2152009 has 2 divisors, whose sum is σ = 2152010. Its totient is φ = 2152008.

The previous prime is 2152001. The next prime is 2152037. The reversal of 2152009 is 9002512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 356409 = 1340^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152009 - 2³ = 2152001 is a prime.

It is a super-2 number, since 2×2152009² = 9262285472162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2152001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076004 + 1076005.

It is an arithmetic number, because the mean of its divisors is an integer number (1076005).

2^2152009 is an apocalyptic number.

It is an amenable number.

2152009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152009 is an equidigital number, since it uses as much as digits as its factorization.

2152009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2152009 is about 1466.9727332163. The cubic root of 2152009 is about 129.1064761994.

The spelling of 2152009 in words is "two million, one hundred fifty-two thousand, nine".