1020255240 has 32 divisors (see below), whose sum is σ = 3060766080. Its totient is φ = 272068032.

The previous prime is 1020255211. The next prime is 1020255241. The reversal of 1020255240 is 425520201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1020255241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4250944 + ... + 4251183.

It is an arithmetic number, because the mean of its divisors is an integer number (95648940).

Almost surely, 2^1020255240 is an apocalyptic number.

1020255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020255240 is an abundant number, since it is smaller than the sum of its proper divisors (2040510840).

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

1020255240 is a wasteful number, since it uses less digits than its factorization.

1020255240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502141 (or 8502137 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1020255240 is about 31941.4345325942. The cubic root of 1020255240 is about 1006.7066667341.

Adding to 1020255240 its reverse (425520201), we get a palindrome (1445775441).

The spelling of 1020255240 in words is "one billion, twenty million, two hundred fifty-five thousand, two hundred forty".