161236061 has 4 divisors (see below), whose sum is σ = 184269792. Its totient is φ = 138202332.

The previous prime is 161236051. The next prime is 161236073. The reversal of 161236061 is 160632161.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161236061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161236061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161236001) 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, 11516855 + ... + 11516868.

It is an arithmetic number, because the mean of its divisors is an integer number (46067448).

Almost surely, 2^161236061 is an apocalyptic number.

It is an amenable number.

161236061 is a deficient number, since it is larger than the sum of its proper divisors (23033731).

161236061 is an equidigital number, since it uses as much as digits as its factorization.

161236061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23033730.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 161236061 is about 12697.8762397497. The cubic root of 161236061 is about 544.2779327423.

It can be divided in two parts, 1612 and 36061, that added together give a palindrome (37673).

The spelling of 161236061 in words is "one hundred sixty-one million, two hundred thirty-six thousand, sixty-one".