1161020534 has 16 divisors (see below), whose sum is σ = 1799809200. Its totient is φ = 561335040.

The previous prime is 1161020533. The next prime is 1161020561. The reversal of 1161020534 is 4350201611.

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 7 ways as a sum of consecutive naturals, for example, 53384 + ... + 71915.

It is an arithmetic number, because the mean of its divisors is an integer number (112488075).

Almost surely, 2^1161020534 is an apocalyptic number.

1161020534 is a deficient number, since it is larger than the sum of its proper divisors (638788666).

1161020534 is a wasteful number, since it uses less digits than its factorization.

1161020534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125455.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1161020534 is about 34073.7513931178. The cubic root of 1161020534 is about 1051.0256143565.

The spelling of 1161020534 in words is "one billion, one hundred sixty-one million, twenty thousand, five hundred thirty-four".