1142002121 has 6 divisors (see below), whose sum is σ = 1236606030. Its totient is φ = 1054155648.

The previous prime is 1142002093. The next prime is 1142002139. The reversal of 1142002121 is 1212002411.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 36772096 + 1105230025 = 6064^2 + 33245^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1142002121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142002096 and 1142002105.

It is not an unprimeable number, because it can be changed into a prime (1142002181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3378536 + ... + 3378873.

It is an arithmetic number, because the mean of its divisors is an integer number (206101005).

Almost surely, 2^1142002121 is an apocalyptic number.

It is an amenable number.

1142002121 is a deficient number, since it is larger than the sum of its proper divisors (94603909).

1142002121 is an equidigital number, since it uses as much as digits as its factorization.

1142002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757435 (or 6757422 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1142002121 is about 33793.5218792005. The cubic root of 1142002121 is about 1045.2551199036.

Adding to 1142002121 its reverse (1212002411), we get a palindrome (2354004532).

The spelling of 1142002121 in words is "one billion, one hundred forty-two million, two thousand, one hundred twenty-one".