1052111509 has 4 divisors (see below), whose sum is σ = 1052296704. Its totient is φ = 1051926316.

The previous prime is 1052111507. The next prime is 1052111527. The reversal of 1052111509 is 9051112501.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9051112501 = 31 ⋅291971371.

It is a cyclic number.

It is not a de Polignac number, because 1052111509 - 2¹ = 1052111507 is a prime.

It is a super-2 number, since 2×1052111509² = 2213877254740514162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052111507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83797 + ... + 95530.

It is an arithmetic number, because the mean of its divisors is an integer number (263074176).

Almost surely, 2^1052111509 is an apocalyptic number.

It is an amenable number.

1052111509 is a deficient number, since it is larger than the sum of its proper divisors (185195).

1052111509 is an equidigital number, since it uses as much as digits as its factorization.

1052111509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185194.

The product of its (nonzero) digits is 450, while the sum is 25.

The square root of 1052111509 is about 32436.2684197797. The cubic root of 1052111509 is about 1017.0772117563.

The spelling of 1052111509 in words is "one billion, fifty-two million, one hundred eleven thousand, five hundred nine".