1160642561 has 8 divisors (see below), whose sum is σ = 1253870184. Its totient is φ = 1067978880.

The previous prime is 1160642551. The next prime is 1160642591. The reversal of 1160642561 is 1652460611.

It can be written as a sum of positive squares in 4 ways, for example, as 96904336 + 1063738225 = 9844^2 + 32615^2 .

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 1160642561 - 2²⁶ = 1093533697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1160642501) 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, 136700 + ... + 144941.

It is an arithmetic number, because the mean of its divisors is an integer number (156733773).

It is a Proth number, since it is equal to 8855 ⋅ 2¹⁷ + 1 and 8855 < 2¹⁷.

Almost surely, 2^1160642561 is an apocalyptic number.

It is an amenable number.

1160642561 is a deficient number, since it is larger than the sum of its proper divisors (93227623).

1160642561 is a wasteful number, since it uses less digits than its factorization.

1160642561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281971.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1160642561 is about 34068.2045461747. The cubic root of 1160642561 is about 1050.9115473467.

The spelling of 1160642561 in words is "one billion, one hundred sixty million, six hundred forty-two thousand, five hundred sixty-one".