1012345520 has 40 divisors (see below), whose sum is σ = 2355679584. Its totient is φ = 404598272.

The previous prime is 1012345513. The next prime is 1012345547. The reversal of 1012345520 is 255432101.

1012345520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 104732 + ... + 113988.

Almost surely, 2^1012345520 is an apocalyptic number.

1012345520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012345520 is an abundant number, since it is smaller than the sum of its proper divisors (1343334064).

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

1012345520 is a wasteful number, since it uses less digits than its factorization.

1012345520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637 (or 10631 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1012345520 is about 31817.3776417856. The cubic root of 1012345520 is about 1004.0983538828.

Adding to 1012345520 its reverse (255432101), we get a palindrome (1267777621).

The spelling of 1012345520 in words is "one billion, twelve million, three hundred forty-five thousand, five hundred twenty".