1001161026 has 32 divisors (see below), whose sum is σ = 2301523200. Its totient is φ = 322212240.

The previous prime is 1001161019. The next prime is 1001161037. The reversal of 1001161026 is 6201611001.

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

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 318090 + ... + 321221.

It is an arithmetic number, because the mean of its divisors is an integer number (71922600).

Almost surely, 2^1001161026 is an apocalyptic number.

1001161026 is an abundant number, since it is smaller than the sum of its proper divisors (1300362174).

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

1001161026 is a wasteful number, since it uses less digits than its factorization.

1001161026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639351 (or 639345 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1001161026 is about 31641.1287093239. The cubic root of 1001161026 is about 1000.3868589875.

Adding to 1001161026 its reverse (6201611001), we get a palindrome (7202772027).

The spelling of 1001161026 in words is "one billion, one million, one hundred sixty-one thousand, twenty-six".