1142255121 has 24 divisors (see below), whose sum is σ = 1814881824. Its totient is φ = 636793920.

The previous prime is 1142255119. The next prime is 1142255123. The reversal of 1142255121 is 1215522411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1142255119) and next prime (1142255123).

It is not a de Polignac number, because 1142255121 - 2¹ = 1142255119 is a prime.

It is a super-2 number, since 2×1142255121² = 2609493522901449282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1142255091 and 1142255100.

It is not an unprimeable number, because it can be changed into a prime (1142255123) 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, 88735 + ... + 100788.

It is an arithmetic number, because the mean of its divisors is an integer number (75620076).

Almost surely, 2^1142255121 is an apocalyptic number.

It is an amenable number.

1142255121 is a deficient number, since it is larger than the sum of its proper divisors (672626703).

1142255121 is a wasteful number, since it uses less digits than its factorization.

1142255121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189581 (or 189574 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1142255121 is about 33797.2649928955. The cubic root of 1142255121 is about 1045.3323030700.

Adding to 1142255121 its reverse (1215522411), we get a palindrome (2357777532).

The spelling of 1142255121 in words is "one billion, one hundred forty-two million, two hundred fifty-five thousand, one hundred twenty-one".