1159400861 has 8 divisors (see below), whose sum is σ = 1165731840. Its totient is φ = 1153080432.

The previous prime is 1159400849. The next prime is 1159400863. The reversal of 1159400861 is 1680049511.

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

It is a cyclic number.

It is not a de Polignac number, because 1159400861 - 2¹⁴ = 1159384477 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 (1159400863) 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, 319091 + ... + 322703.

It is an arithmetic number, because the mean of its divisors is an integer number (145716480).

Almost surely, 2^1159400861 is an apocalyptic number.

It is an amenable number.

1159400861 is a deficient number, since it is larger than the sum of its proper divisors (6330979).

1159400861 is a wasteful number, since it uses less digits than its factorization.

1159400861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1159400861 is about 34049.9759324438. The cubic root of 1159400861 is about 1050.5366451046.

The spelling of 1159400861 in words is "one billion, one hundred fifty-nine million, four hundred thousand, eight hundred sixty-one".