1001561202 has 24 divisors (see below), whose sum is σ = 2222978940. Its totient is φ = 325710720.

The previous prime is 1001561191. The next prime is 1001561207. The reversal of 1001561202 is 2021651001.

1001561202 is a `hidden beast` number, since 100 + 1 + 561 + 2 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1001152881 + 408321 = 31641^2 + 639^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1001561207) 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 11 ways as a sum of consecutive naturals, for example, 677827 + ... + 679302.

Almost surely, 2^1001561202 is an apocalyptic number.

1001561202 is an abundant number, since it is smaller than the sum of its proper divisors (1221417738).

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

1001561202 is a wasteful number, since it uses less digits than its factorization.

1001561202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357178 (or 1357175 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1001561202 is about 31647.4517457567. The cubic root of 1001561202 is about 1000.5201300845.

It can be divided in two parts, 10015 and 61202, that added together give a palindrome (71217).

The spelling of 1001561202 in words is "one billion, one million, five hundred sixty-one thousand, two hundred two".