1161020535 has 16 divisors (see below), whose sum is σ = 1863613440. Its totient is φ = 617217440.

The previous prime is 1161020533. The next prime is 1161020561. The reversal of 1161020535 is 5350201611.

It is not a de Polignac number, because 1161020535 - 2¹ = 1161020533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161020533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119775 + ... + 129104.

It is an arithmetic number, because the mean of its divisors is an integer number (116475840).

Almost surely, 2^1161020535 is an apocalyptic number.

1161020535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161020535 is a deficient number, since it is larger than the sum of its proper divisors (702592905).

1161020535 is a wasteful number, since it uses less digits than its factorization.

1161020535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249198.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1161020535 is about 34073.7514077919. The cubic root of 1161020535 is about 1051.0256146582.

The spelling of 1161020535 in words is "one billion, one hundred sixty-one million, twenty thousand, five hundred thirty-five".