1012561203 has 16 divisors (see below), whose sum is σ = 1388481696. Its totient is φ = 655891200.

The previous prime is 1012561171. The next prime is 1012561219. The reversal of 1012561203 is 3021652101.

It is not a de Polignac number, because 1012561203 - 2⁵ = 1012561171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012561203.

It is not an unprimeable number, because it can be changed into a prime (1012561273) 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, 79903 + ... + 91703.

It is an arithmetic number, because the mean of its divisors is an integer number (86780106).

Almost surely, 2^1012561203 is an apocalyptic number.

1012561203 is a deficient number, since it is larger than the sum of its proper divisors (375920493).

1012561203 is a wasteful number, since it uses less digits than its factorization.

1012561203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1012561203 is about 31820.7668512247. The cubic root of 1012561203 is about 1004.1696574587.

The spelling of 1012561203 in words is "one billion, twelve million, five hundred sixty-one thousand, two hundred three".