1020104857 has 2 divisors, whose sum is σ = 1020104858. Its totient is φ = 1020104856.

The previous prime is 1020104849. The next prime is 1020104861. The reversal of 1020104857 is 7584010201.

1020104857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550559296 + 469545561 = 23464^2 + 21669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020104857 - 2³ = 1020104849 is a prime.

It is a super-2 number, since 2×1020104857² = 2081227838549980898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020102857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510052428 + 510052429.

It is an arithmetic number, because the mean of its divisors is an integer number (510052429).

Almost surely, 2^1020104857 is an apocalyptic number.

It is an amenable number.

1020104857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020104857 is an equidigital number, since it uses as much as digits as its factorization.

1020104857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 1020104857 is about 31939.0804031675. The cubic root of 1020104857 is about 1006.6572023120.

The spelling of 1020104857 in words is "one billion, twenty million, one hundred four thousand, eight hundred fifty-seven".