1161542723 has 8 divisors (see below), whose sum is σ = 1279684656. Its totient is φ = 1045492000.

The previous prime is 1161542717. The next prime is 1161542743. The reversal of 1161542723 is 3272451611.

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 1161542723 - 2⁶ = 1161542659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161542723.

It is not an unprimeable number, because it can be changed into a prime (1161542743) 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, 521636 + ... + 523857.

It is an arithmetic number, because the mean of its divisors is an integer number (159960582).

Almost surely, 2^1161542723 is an apocalyptic number.

1161542723 is a deficient number, since it is larger than the sum of its proper divisors (118141933).

1161542723 is a wasteful number, since it uses less digits than its factorization.

1161542723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045605.

The product of its digits is 10080, while the sum is 32.

The square root of 1161542723 is about 34081.4131602550. The cubic root of 1161542723 is about 1051.1831630350.

The spelling of 1161542723 in words is "one billion, one hundred sixty-one million, five hundred forty-two thousand, seven hundred twenty-three".