1020434605 has 16 divisors (see below), whose sum is σ = 1304524224. Its totient is φ = 763603200.

The previous prime is 1020434603. The next prime is 1020434627. The reversal of 1020434605 is 5064340201.

It is not a de Polignac number, because 1020434605 - 2¹ = 1020434603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020434605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020434603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22971 + ... + 50680.

It is an arithmetic number, because the mean of its divisors is an integer number (81532764).

Almost surely, 2^1020434605 is an apocalyptic number.

It is an amenable number.

1020434605 is a deficient number, since it is larger than the sum of its proper divisors (284089619).

1020434605 is a wasteful number, since it uses less digits than its factorization.

1020434605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73836.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1020434605 is about 31944.2421259294. The cubic root of 1020434605 is about 1006.7656576459.

Adding to 1020434605 its reverse (5064340201), we get a palindrome (6084774806).

The spelling of 1020434605 in words is "one billion, twenty million, four hundred thirty-four thousand, six hundred five".