1153542013 has 4 divisors (see below), whose sum is σ = 1242276028. Its totient is φ = 1064808000.

The previous prime is 1153541941. The next prime is 1153542043. The reversal of 1153542013 is 3102453511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164942649 + 988599364 = 12843^2 + 31442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153542013 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 (1153542043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44366988 + ... + 44367013.

It is an arithmetic number, because the mean of its divisors is an integer number (310569007).

Almost surely, 2^1153542013 is an apocalyptic number.

1153542013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1153542013 is a deficient number, since it is larger than the sum of its proper divisors (88734015).

1153542013 is an equidigital number, since it uses as much as digits as its factorization.

1153542013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88734014.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1153542013 is about 33963.8338972502. The cubic root of 1153542013 is about 1048.7640826270.

Adding to 1153542013 its reverse (3102453511), we get a palindrome (4255995524).

The spelling of 1153542013 in words is "one billion, one hundred fifty-three million, five hundred forty-two thousand, thirteen".