1020635155 has 4 divisors (see below), whose sum is σ = 1224762192. Its totient is φ = 816508120.

The previous prime is 1020635129. The next prime is 1020635183. The reversal of 1020635155 is 5515360201.

1020635155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1020635155 - 2¹⁷ = 1020504083 is a prime.

It is a super-2 number, since 2×1020635155² = 2083392239243748050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102063511 + ... + 102063520.

It is an arithmetic number, because the mean of its divisors is an integer number (306190548).

Almost surely, 2^1020635155 is an apocalyptic number.

1020635155 is a deficient number, since it is larger than the sum of its proper divisors (204127037).

1020635155 is an equidigital number, since it uses as much as digits as its factorization.

1020635155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204127036.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1020635155 is about 31947.3810350708. The cubic root of 1020635155 is about 1006.8316078551.

Adding to 1020635155 its reverse (5515360201), we get a palindrome (6535995356).

The spelling of 1020635155 in words is "one billion, twenty million, six hundred thirty-five thousand, one hundred fifty-five".