1161525543 has 8 divisors (see below), whose sum is σ = 1553987568. Its totient is φ = 771706944.

The previous prime is 1161525539. The next prime is 1161525551. The reversal of 1161525543 is 3455251611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161525543 - 2² = 1161525539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161525943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659830 + ... + 661587.

It is an arithmetic number, because the mean of its divisors is an integer number (194248446).

Almost surely, 2^1161525543 is an apocalyptic number.

1161525543 is a deficient number, since it is larger than the sum of its proper divisors (392462025).

1161525543 is a wasteful number, since it uses less digits than its factorization.

1161525543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321713.

The product of its digits is 18000, while the sum is 33.

The square root of 1161525543 is about 34081.1611157836. The cubic root of 1161525543 is about 1051.1779804402.

The spelling of 1161525543 in words is "one billion, one hundred sixty-one million, five hundred twenty-five thousand, five hundred forty-three".