1021240142 has 8 divisors (see below), whose sum is σ = 1649695656. Its totient is φ = 471341592.

The previous prime is 1021240127. The next prime is 1021240169. The reversal of 1021240142 is 2410421201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1021240142.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19639208 + ... + 19639259.

It is an arithmetic number, because the mean of its divisors is an integer number (206211957).

Almost surely, 2^1021240142 is an apocalyptic number.

1021240142 is a deficient number, since it is larger than the sum of its proper divisors (628455514).

1021240142 is a wasteful number, since it uses less digits than its factorization.

1021240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39278482.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1021240142 is about 31956.8481236808. The cubic root of 1021240142 is about 1007.0305035191.

Adding to 1021240142 its reverse (2410421201), we get a palindrome (3431661343).

The spelling of 1021240142 in words is "one billion, twenty-one million, two hundred forty thousand, one hundred forty-two".