1352042009 has 4 divisors (see below), whose sum is σ = 1352418816. Its totient is φ = 1351665204.

The previous prime is 1352041981. The next prime is 1352042017. The reversal of 1352042009 is 9002402531.

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 1352042009 - 2²⁰ = 1350993433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1352042039) 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, 182969 + ... + 190214.

It is an arithmetic number, because the mean of its divisors is an integer number (338104704).

Almost surely, 2^1352042009 is an apocalyptic number.

It is an amenable number.

1352042009 is a deficient number, since it is larger than the sum of its proper divisors (376807).

1352042009 is an equidigital number, since it uses as much as digits as its factorization.

1352042009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376806.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1352042009 is about 36770.1238643549. The cubic root of 1352042009 is about 1105.7664151961.

The spelling of 1352042009 in words is "one billion, three hundred fifty-two million, forty-two thousand, nine".