1153142121 has 8 divisors (see below), whose sum is σ = 1538502880. Its totient is φ = 768271392.

The previous prime is 1153142119. The next prime is 1153142161. The reversal of 1153142121 is 1212413511.

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

It is not a de Polignac number, because 1153142121 - 2¹ = 1153142119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153142101) 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, 116980 + ... + 126453.

It is an arithmetic number, because the mean of its divisors is an integer number (192312860).

Almost surely, 2^1153142121 is an apocalyptic number.

It is an amenable number.

1153142121 is a deficient number, since it is larger than the sum of its proper divisors (385360759).

1153142121 is a wasteful number, since it uses less digits than its factorization.

1153142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245015.

The product of its digits is 240, while the sum is 21.

The square root of 1153142121 is about 33957.9463601673. The cubic root of 1153142121 is about 1048.6428788812.

Adding to 1153142121 its reverse (1212413511), we get a palindrome (2365555632).

The spelling of 1153142121 in words is "one billion, one hundred fifty-three million, one hundred forty-two thousand, one hundred twenty-one".