1021304142542 has 16 divisors (see below), whose sum is σ = 1547854751520. Its totient is φ = 505353274368.

The previous prime is 1021304142517. The next prime is 1021304142587. The reversal of 1021304142542 is 2452414031201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2811959 + ... + 3154317.

It is an arithmetic number, because the mean of its divisors is an integer number (96740921970).

Almost surely, 2^{1021304142542} is an apocalyptic number.

1021304142542 is a deficient number, since it is larger than the sum of its proper divisors (526550608978).

1021304142542 is a wasteful number, since it uses less digits than its factorization.

1021304142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357835.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 1021304142542 its reverse (2452414031201), we get a palindrome (3473718173743).

The spelling of 1021304142542 in words is "one trillion, twenty-one billion, three hundred four million, one hundred forty-two thousand, five hundred forty-two".