1000501161 has 16 divisors (see below), whose sum is σ = 1502220288. Its totient is φ = 586803600.

The previous prime is 1000501157. The next prime is 1000501163. The reversal of 1000501161 is 1611050001.

It is not a de Polignac number, because 1000501161 - 2² = 1000501157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000501161.

It is not an unprimeable number, because it can be changed into a prime (1000501163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487981 + ... + 490026.

It is an arithmetic number, because the mean of its divisors is an integer number (93888768).

Almost surely, 2^1000501161 is an apocalyptic number.

1000501161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000501161 is a deficient number, since it is larger than the sum of its proper divisors (501719127).

1000501161 is a wasteful number, since it uses less digits than its factorization.

1000501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978052.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1000501161 is about 31630.6996602984. The cubic root of 1000501161 is about 1000.1670257675.

Adding to 1000501161 its reverse (1611050001), we get a palindrome (2611551162).

The spelling of 1000501161 in words is "one billion, five hundred one thousand, one hundred sixty-one".