1020100042 has 16 divisors (see below), whose sum is σ = 1662441480. Its totient is φ = 466647552.

The previous prime is 1020100033. The next prime is 1020100073. The reversal of 1020100042 is 2400010201.

It can be written as a sum of positive squares in 4 ways, for example, as 84290761 + 935809281 = 9181^2 + 30591^2 .

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 7 ways as a sum of consecutive naturals, for example, 170667 + ... + 176542.

Almost surely, 2^1020100042 is an apocalyptic number.

1020100042 is a deficient number, since it is larger than the sum of its proper divisors (642341438).

1020100042 is a wasteful number, since it uses less digits than its factorization.

1020100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347337.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1020100042 is about 31939.0050252039. The cubic root of 1020100042 is about 1006.6556184676.

Adding to 1020100042 its reverse (2400010201), we get a palindrome (3420110243).

The spelling of 1020100042 in words is "one billion, twenty million, one hundred thousand, forty-two".