2152609 has 4 divisors (see below), whose sum is σ = 2222080. Its totient is φ = 2083140.

The previous prime is 2152607. The next prime is 2152621. The reversal of 2152609 is 9062512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2152609 - 2¹ = 2152607 is a prime.

2152609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2152607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34689 + ... + 34750.

It is an arithmetic number, because the mean of its divisors is an integer number (555520).

2^2152609 is an apocalyptic number.

It is an amenable number.

2152609 is a deficient number, since it is larger than the sum of its proper divisors (69471).

2152609 is an equidigital number, since it uses as much as digits as its factorization.

2152609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69470.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2152609 is about 1467.1772217425. The cubic root of 2152609 is about 129.1184737774.

Subtracting 2152609 from its reverse (9062512), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2152609 in words is "two million, one hundred fifty-two thousand, six hundred nine".