161242260 has 48 divisors (see below), whose sum is σ = 461985216. Its totient is φ = 41997312.

The previous prime is 161242247. The next prime is 161242261. The reversal of 161242260 is 62242161.

161242260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161242260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161242261) 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 15 ways as a sum of consecutive naturals, for example, 28669 + ... + 33828.

It is an arithmetic number, because the mean of its divisors is an integer number (9624692).

Almost surely, 2^161242260 is an apocalyptic number.

161242260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161242260 is an abundant number, since it is smaller than the sum of its proper divisors (300742956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161242260 is a wasteful number, since it uses less digits than its factorization.

161242260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62552 (or 62550 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 161242260 is about 12698.1203333407. The cubic root of 161242260 is about 544.2849078893.

Subtracting from 161242260 its reverse (62242161), we obtain a palindrome (99000099).

The spelling of 161242260 in words is "one hundred sixty-one million, two hundred forty-two thousand, two hundred sixty".