1020255144 has 16 divisors (see below), whose sum is σ = 2550637920. Its totient is φ = 340085040.

The previous prime is 1020255143. The next prime is 1020255209. The reversal of 1020255144 is 4415520201.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 42510631 = 1020255144 / (1 + 0 + 2 + 0 + 2 + 5 + 5 + 1 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (1020255143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21255292 + ... + 21255339.

It is an arithmetic number, because the mean of its divisors is an integer number (159414870).

Almost surely, 2^1020255144 is an apocalyptic number.

It is an amenable number.

1020255144 is an abundant number, since it is smaller than the sum of its proper divisors (1530382776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020255144 is a wasteful number, since it uses less digits than its factorization.

1020255144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42510640 (or 42510636 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1020255144 is about 31941.4330298439. The cubic root of 1020255144 is about 1006.7066351590.

Adding to 1020255144 its reverse (4415520201), we get a palindrome (5435775345).

The spelling of 1020255144 in words is "one billion, twenty million, two hundred fifty-five thousand, one hundred forty-four".