1020439975 has 12 divisors (see below), whose sum is σ = 1265796216. Its totient is φ = 816061280.

The previous prime is 1020439967. The next prime is 1020439993. The reversal of 1020439975 is 5799340201.

It is not a de Polignac number, because 1020439975 - 2³ = 1020439967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89709 + ... + 100441.

It is an arithmetic number, because the mean of its divisors is an integer number (105483018).

Almost surely, 2^1020439975 is an apocalyptic number.

1020439975 is a deficient number, since it is larger than the sum of its proper divisors (245356241).

1020439975 is a wasteful number, since it uses less digits than its factorization.

1020439975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546 (or 14541 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1020439975 is about 31944.3261785250. The cubic root of 1020439975 is about 1006.7674236654.

The spelling of 1020439975 in words is "one billion, twenty million, four hundred thirty-nine thousand, nine hundred seventy-five".