1020005042 has 16 divisors (see below), whose sum is σ = 1749055680. Its totient is φ = 437026128.

The previous prime is 1020005003. The next prime is 1020005053. The reversal of 1020005042 is 2405000201.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 60809 + ... + 75747.

It is an arithmetic number, because the mean of its divisors is an integer number (109315980).

Almost surely, 2^1020005042 is an apocalyptic number.

1020005042 is a deficient number, since it is larger than the sum of its proper divisors (729050638).

1020005042 is a wasteful number, since it uses less digits than its factorization.

1020005042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19825.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1020005042 is about 31937.5177808170. The cubic root of 1020005042 is about 1006.6243681821.

Adding to 1020005042 its reverse (2405000201), we get a palindrome (3425005243).

The spelling of 1020005042 in words is "one billion, twenty million, five thousand, forty-two".