1001013001 has 4 divisors (see below), whose sum is σ = 1001077252. Its totient is φ = 1000948752.

The previous prime is 1001012959. The next prime is 1001013007. The reversal of 1001013001 is 1003101001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 291589776 + 709423225 = 17076^2 + 26635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001013001 - 2¹⁷ = 1000881929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001013007) 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 3 ways as a sum of consecutive naturals, for example, 7711 + ... + 45403.

It is an arithmetic number, because the mean of its divisors is an integer number (250269313).

Almost surely, 2^1001013001 is an apocalyptic number.

It is an amenable number.

1001013001 is a deficient number, since it is larger than the sum of its proper divisors (64251).

1001013001 is an equidigital number, since it uses as much as digits as its factorization.

1001013001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64250.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 1001013001 is about 31638.7894996000. The cubic root of 1001013001 is about 1000.3375530451.

Adding to 1001013001 its reverse (1003101001), we get a palindrome (2004114002).

It can be divided in two parts, 100 and 1013001, that added together give a palindrome (1013101).

The spelling of 1001013001 in words is "one billion, one million, thirteen thousand, one".