1004006161 has 4 divisors (see below), whose sum is σ = 1010165872. Its totient is φ = 997846452.

The previous prime is 1004006149. The next prime is 1004006177. The reversal of 1004006161 is 1616004001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1616004001 = 32563 ⋅49627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004006161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004006131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3079611 + ... + 3079936.

It is an arithmetic number, because the mean of its divisors is an integer number (252541468).

Almost surely, 2^1004006161 is an apocalyptic number.

It is an amenable number.

1004006161 is a deficient number, since it is larger than the sum of its proper divisors (6159711).

1004006161 is an equidigital number, since it uses as much as digits as its factorization.

1004006161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159710.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1004006161 is about 31686.0562550785. The cubic root of 1004006161 is about 1001.3336076999. Note that the first 3 decimals are identical.

The spelling of 1004006161 in words is "one billion, four million, six thousand, one hundred sixty-one".