1153642111 has 4 divisors (see below), whose sum is σ = 1153718424. Its totient is φ = 1153565800.

The previous prime is 1153642097. The next prime is 1153642159. The reversal of 1153642111 is 1112463511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1153642111 - 2⁵ = 1153642079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153642181) 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 3 ways as a sum of consecutive naturals, for example, 7000 + ... + 48541.

It is an arithmetic number, because the mean of its divisors is an integer number (288429606).

Almost surely, 2^1153642111 is an apocalyptic number.

1153642111 is a deficient number, since it is larger than the sum of its proper divisors (76313).

1153642111 is an equidigital number, since it uses as much as digits as its factorization.

1153642111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76312.

The product of its digits is 720, while the sum is 25.

The square root of 1153642111 is about 33965.3074621738. The cubic root of 1153642111 is about 1048.7944170664.

The spelling of 1153642111 in words is "one billion, one hundred fifty-three million, six hundred forty-two thousand, one hundred eleven".