120641605 has 24 divisors (see below), whose sum is σ = 175771008. Its totient is φ = 77852928.

The previous prime is 120641603. The next prime is 120641627. The reversal of 120641605 is 506146021.

It is not a de Polignac number, because 120641605 - 2¹ = 120641603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120641605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120641603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4152 + ... + 16078.

It is an arithmetic number, because the mean of its divisors is an integer number (7323792).

Almost surely, 2^120641605 is an apocalyptic number.

It is an amenable number.

120641605 is a deficient number, since it is larger than the sum of its proper divisors (55129403).

120641605 is a wasteful number, since it uses less digits than its factorization.

120641605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11973 (or 11956 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 120641605 is about 10983.6972372694. The cubic root of 120641605 is about 494.1199272284.

Adding to 120641605 its reverse (506146021), we get a palindrome (626787626).

The spelling of 120641605 in words is "one hundred twenty million, six hundred forty-one thousand, six hundred five".