1142521155 has 24 divisors (see below), whose sum is σ = 2012839920. Its totient is φ = 599353920.

The previous prime is 1142521153. The next prime is 1142521169. The reversal of 1142521155 is 5511252411.

It is a happy number.

1142521155 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1142521155 - 2¹ = 1142521153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142521153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205365 + ... + 210854.

It is an arithmetic number, because the mean of its divisors is an integer number (83868330).

Almost surely, 2^1142521155 is an apocalyptic number.

1142521155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1142521155 is a deficient number, since it is larger than the sum of its proper divisors (870318765).

1142521155 is a wasteful number, since it uses less digits than its factorization.

1142521155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416291 (or 416288 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1142521155 is about 33801.2004964321. The cubic root of 1142521155 is about 1045.4134502504.

Adding to 1142521155 its reverse (5511252411), we get a palindrome (6653773566).

The spelling of 1142521155 in words is "one billion, one hundred forty-two million, five hundred twenty-one thousand, one hundred fifty-five".