1260815020 has 24 divisors (see below), whose sum is σ = 2739013200. Its totient is φ = 486935232.

The previous prime is 1260814987. The next prime is 1260815051. The reversal of 1260815020 is 205180621.

It is a super-3 number, since 3×1260815020³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086330 + ... + 1087489.

It is an arithmetic number, because the mean of its divisors is an integer number (114125550).

Almost surely, 2^1260815020 is an apocalyptic number.

1260815020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260815020 is an abundant number, since it is smaller than the sum of its proper divisors (1478198180).

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

1260815020 is a wasteful number, since it uses less digits than its factorization.

1260815020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173857 (or 2173855 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1260815020 is about 35507.9571363941. The cubic root of 1260815020 is about 1080.3151286628.

Adding to 1260815020 its reverse (205180621), we get a palindrome (1465995641).

The spelling of 1260815020 in words is "one billion, two hundred sixty million, eight hundred fifteen thousand, twenty".