120001641 has 4 divisors (see below), whose sum is σ = 160002192. Its totient is φ = 80001092.

The previous prime is 120001631. The next prime is 120001643. The reversal of 120001641 is 146100021.

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: 146100021 = 3 ⋅48700007.

It is a cyclic number.

It is not a de Polignac number, because 120001641 - 2¹⁵ = 119968873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120001641.

It is not an unprimeable number, because it can be changed into a prime (120001643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20000271 + ... + 20000276.

It is an arithmetic number, because the mean of its divisors is an integer number (40000548).

Almost surely, 2^120001641 is an apocalyptic number.

It is an amenable number.

120001641 is a deficient number, since it is larger than the sum of its proper divisors (40000551).

120001641 is an equidigital number, since it uses as much as digits as its factorization.

120001641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40000550.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 120001641 is about 10954.5260509070. The cubic root of 120001641 is about 493.2446632192.

Adding to 120001641 its reverse (146100021), we get a palindrome (266101662).

The spelling of 120001641 in words is "one hundred twenty million, one thousand, six hundred forty-one".