1160026561 has 4 divisors (see below), whose sum is σ = 1160762800. Its totient is φ = 1159290324.

The previous prime is 1160026547. The next prime is 1160026607. The reversal of 1160026561 is 1656200611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1656200611 = 13 ⋅127400047.

It is a cyclic number.

It is not a de Polignac number, because 1160026561 - 2¹¹ = 1160024513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1160026531) 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, 365751 + ... + 368908.

It is an arithmetic number, because the mean of its divisors is an integer number (290190700).

Almost surely, 2^1160026561 is an apocalyptic number.

It is an amenable number.

1160026561 is a deficient number, since it is larger than the sum of its proper divisors (736239).

1160026561 is an equidigital number, since it uses as much as digits as its factorization.

1160026561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736238.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1160026561 is about 34059.1626585270. The cubic root of 1160026561 is about 1050.7255940091.

The spelling of 1160026561 in words is "one billion, one hundred sixty million, twenty-six thousand, five hundred sixty-one".