1305020042 has 8 divisors (see below), whose sum is σ = 1957730016. Its totient is φ = 652443372.

The previous prime is 1305019993. The next prime is 1305020099. The reversal of 1305020042 is 2400205031.

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 1305020042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518 + ... + 51209.

It is an arithmetic number, because the mean of its divisors is an integer number (244716252).

Almost surely, 2^1305020042 is an apocalyptic number.

1305020042 is a deficient number, since it is larger than the sum of its proper divisors (652709974).

1305020042 is a wasteful number, since it uses less digits than its factorization.

1305020042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66652.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1305020042 is about 36125.0611348964. The cubic root of 1305020042 is about 1092.7959089316.

Adding to 1305020042 its reverse (2400205031), we get a palindrome (3705225073).

The spelling of 1305020042 in words is "one billion, three hundred five million, twenty thousand, forty-two".