1021442042 has 8 divisors (see below), whose sum is σ = 1622290356. Its totient is φ = 480678592.

The previous prime is 1021442041. The next prime is 1021442047. The reversal of 1021442042 is 2402441201.

It can be written as a sum of positive squares in 2 ways, for example, as 993447361 + 27994681 = 31519^2 + 5291^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1021442041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15021173 + ... + 15021240.

Almost surely, 2^1021442042 is an apocalyptic number.

1021442042 is a deficient number, since it is larger than the sum of its proper divisors (600848314).

1021442042 is a wasteful number, since it uses less digits than its factorization.

1021442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30042432.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1021442042 is about 31960.0069148929. The cubic root of 1021442042 is about 1007.0968627272.

Adding to 1021442042 its reverse (2402441201), we get a palindrome (3423883243).

The spelling of 1021442042 in words is "one billion, twenty-one million, four hundred forty-two thousand, forty-two".