1020920258 has 4 divisors (see below), whose sum is σ = 1531380390. Its totient is φ = 510460128.

The previous prime is 1020920231. The next prime is 1020920273. The reversal of 1020920258 is 8520290201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 545549449 + 475370809 = 23357^2 + 21803^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1020920258.

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 as a sum of consecutive naturals, namely, 255230063 + ... + 255230066.

Almost surely, 2^1020920258 is an apocalyptic number.

1020920258 is a deficient number, since it is larger than the sum of its proper divisors (510460132).

1020920258 is an equidigital number, since it uses as much as digits as its factorization.

1020920258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510460131.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1020920258 is about 31951.8427950564. The cubic root of 1020920258 is about 1006.9253481718.

The spelling of 1020920258 in words is "one billion, twenty million, nine hundred twenty thousand, two hundred fifty-eight".