142133121 has 24 divisors (see below), whose sum is σ = 225277416. Its totient is φ = 85812480.

The previous prime is 142133081. The next prime is 142133137. The reversal of 142133121 is 121331241.

It can be written as a sum of positive squares in 4 ways, for example, as 12173121 + 129960000 = 3489^2 + 11400^2 .

It is not a de Polignac number, because 142133121 - 2⁷ = 142132993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142133094 and 142133103.

It is not an unprimeable number, because it can be changed into a prime (142133521) 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, 5260 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (9386559).

Almost surely, 2^142133121 is an apocalyptic number.

It is an amenable number.

142133121 is a deficient number, since it is larger than the sum of its proper divisors (83144295).

142133121 is a wasteful number, since it uses less digits than its factorization.

142133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22993 (or 22990 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 142133121 is about 11921.9596124127. The cubic root of 142133121 is about 521.8733232929.

Adding to 142133121 its reverse (121331241), we get a palindrome (263464362).

The spelling of 142133121 in words is "one hundred forty-two million, one hundred thirty-three thousand, one hundred twenty-one".