1145709309 has 8 divisors (see below), whose sum is σ = 1528067392. Its totient is φ = 763578720.

The previous prime is 1145709287. The next prime is 1145709319. The reversal of 1145709309 is 9039075411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1145709309 - 2¹⁶ = 1145643773 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 (1145709319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44752 + ... + 65529.

It is an arithmetic number, because the mean of its divisors is an integer number (191008424).

Almost surely, 2^1145709309 is an apocalyptic number.

It is an amenable number.

1145709309 is a deficient number, since it is larger than the sum of its proper divisors (382358083).

1145709309 is a wasteful number, since it uses less digits than its factorization.

1145709309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113747.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1145709309 is about 33848.3280089283. The cubic root of 1145709309 is about 1046.3849402797.

The spelling of 1145709309 in words is "one billion, one hundred forty-five million, seven hundred nine thousand, three hundred nine".