1020012520 has 32 divisors (see below), whose sum is σ = 2296330920. Its totient is φ = 407773440.

The previous prime is 1020012493. The next prime is 1020012571. The reversal of 1020012520 is 252100201.

It can be written as a sum of positive squares in 4 ways, for example, as 996412356 + 23600164 = 31566^2 + 4858^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1020012520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75910 + ... + 88330.

Almost surely, 2^1020012520 is an apocalyptic number.

1020012520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020012520 is an abundant number, since it is smaller than the sum of its proper divisors (1276318400).

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

1020012520 is a wasteful number, since it uses less digits than its factorization.

1020012520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14485 (or 14481 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1020012520 is about 31937.6348529443. The cubic root of 1020012520 is about 1006.6268281434.

Adding to 1020012520 its reverse (252100201), we get a palindrome (1272112721).

The spelling of 1020012520 in words is "one billion, twenty million, twelve thousand, five hundred twenty".