1125343409 has 4 divisors (see below), whose sum is σ = 1130390016. Its totient is φ = 1120296804.

The previous prime is 1125343319. The next prime is 1125343423. The reversal of 1125343409 is 9043435211.

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 1125343409 - 2¹⁶ = 1125277873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125342409) 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, 2522969 + ... + 2523414.

It is an arithmetic number, because the mean of its divisors is an integer number (282597504).

Almost surely, 2^1125343409 is an apocalyptic number.

It is an amenable number.

1125343409 is a deficient number, since it is larger than the sum of its proper divisors (5046607).

1125343409 is an equidigital number, since it uses as much as digits as its factorization.

1125343409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046606.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1125343409 is about 33546.1385110120. The cubic root of 1125343409 is about 1040.1477258719.

The spelling of 1125343409 in words is "one billion, one hundred twenty-five million, three hundred forty-three thousand, four hundred nine".