1020140520 has 64 divisors (see below), whose sum is σ = 3497627520. Its totient is φ = 233174784.

The previous prime is 1020140519. The next prime is 1020140521. The reversal of 1020140520 is 250410201.

It is an interprime number because it is at equal distance from previous prime (1020140519) and next prime (1020140521).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020140520.

It is not an unprimeable number, because it can be changed into a prime (1020140521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606387 + ... + 608066.

It is an arithmetic number, because the mean of its divisors is an integer number (54650430).

Almost surely, 2^1020140520 is an apocalyptic number.

1020140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020140520 is an abundant number, since it is smaller than the sum of its proper divisors (2477487000).

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

1020140520 is a wasteful number, since it uses less digits than its factorization.

1020140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214474 (or 1214470 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1020140520 is about 31939.6386955144. The cubic root of 1020140520 is about 1006.6689331314.

Adding to 1020140520 its reverse (250410201), we get a palindrome (1270550721).

It can be divided in two parts, 10201 and 40520, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 1020140520 in words is "one billion, twenty million, one hundred forty thousand, five hundred twenty".