4020002161 has 8 divisors (see below), whose sum is σ = 4595495360. Its totient is φ = 3444810768.

The previous prime is 4020002093. The next prime is 4020002177. The reversal of 4020002161 is 1612000204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4020002161 - 2⁹ = 4020001649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020002561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46146 + ... + 100843.

It is an arithmetic number, because the mean of its divisors is an integer number (574436920).

Almost surely, 2^4020002161 is an apocalyptic number.

It is an amenable number.

4020002161 is a deficient number, since it is larger than the sum of its proper divisors (575493199).

4020002161 is a wasteful number, since it uses less digits than its factorization.

4020002161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150903.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4020002161 is about 63403.4869782412. The cubic root of 4020002161 is about 1590.0426080641.

Adding to 4020002161 its reverse (1612000204), we get a palindrome (5632002365).

The spelling of 4020002161 in words is "four billion, twenty million, two thousand, one hundred sixty-one".