1156423549 has 8 divisors (see below), whose sum is σ = 1164670272. Its totient is φ = 1148191200.

The previous prime is 1156423531. The next prime is 1156423561. The reversal of 1156423549 is 9453246511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156423549 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 (1156423649) 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, 196449 + ... + 202249.

It is an arithmetic number, because the mean of its divisors is an integer number (145583784).

Almost surely, 2^1156423549 is an apocalyptic number.

It is an amenable number.

1156423549 is a deficient number, since it is larger than the sum of its proper divisors (8246723).

1156423549 is a wasteful number, since it uses less digits than its factorization.

1156423549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7187.

The product of its digits is 129600, while the sum is 40.

The square root of 1156423549 is about 34006.2280913364. The cubic root of 1156423549 is about 1049.6366237686.

The spelling of 1156423549 in words is "one billion, one hundred fifty-six million, four hundred twenty-three thousand, five hundred forty-nine".