1125263309 has 4 divisors (see below), whose sum is σ = 1141112160. Its totient is φ = 1109414460.

The previous prime is 1125263263. The next prime is 1125263317. The reversal of 1125263309 is 9033625211.

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 a de Polignac number, because none of the positive numbers 2^k-1125263309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125263329) 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, 7924319 + ... + 7924460.

It is an arithmetic number, because the mean of its divisors is an integer number (285278040).

Almost surely, 2^1125263309 is an apocalyptic number.

It is an amenable number.

1125263309 is a deficient number, since it is larger than the sum of its proper divisors (15848851).

1125263309 is an equidigital number, since it uses as much as digits as its factorization.

1125263309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15848850.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1125263309 is about 33544.9446116699. The cubic root of 1125263309 is about 1040.1230466469.

The spelling of 1125263309 in words is "one billion, one hundred twenty-five million, two hundred sixty-three thousand, three hundred nine".