1159401599 has 4 divisors (see below), whose sum is σ = 1159556736. Its totient is φ = 1159246464.

The previous prime is 1159401589. The next prime is 1159401601. The reversal of 1159401599 is 9951049511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1159401599 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 (1159401589) 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, 65759 + ... + 81504.

It is an arithmetic number, because the mean of its divisors is an integer number (289889184).

Almost surely, 2^1159401599 is an apocalyptic number.

1159401599 is a deficient number, since it is larger than the sum of its proper divisors (155137).

1159401599 is an equidigital number, since it uses as much as digits as its factorization.

1159401599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155136.

The product of its (nonzero) digits is 72900, while the sum is 44.

The square root of 1159401599 is about 34049.9867694541. The cubic root of 1159401599 is about 1050.5368680059.

The spelling of 1159401599 in words is "one billion, one hundred fifty-nine million, four hundred one thousand, five hundred ninety-nine".