1240121142 has 48 divisors (see below), whose sum is σ = 2993412240. Its totient is φ = 368415936.

The previous prime is 1240121111. The next prime is 1240121143. The reversal of 1240121142 is 2411210421.

1240121142 is a `hidden beast` number, since 12 + 401 + 211 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84588 + ... + 98159.

It is an arithmetic number, because the mean of its divisors is an integer number (62362755).

Almost surely, 2^1240121142 is an apocalyptic number.

1240121142 is an abundant number, since it is smaller than the sum of its proper divisors (1753291098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240121142 is a wasteful number, since it uses less digits than its factorization.

1240121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182797 (or 182794 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1240121142 is about 35215.3537821218. The cubic root of 1240121142 is about 1074.3720556942.

Adding to 1240121142 its reverse (2411210421), we get a palindrome (3651331563).

The spelling of 1240121142 in words is "one billion, two hundred forty million, one hundred twenty-one thousand, one hundred forty-two".