161261067 has 8 divisors (see below), whose sum is σ = 234561600. Its totient is φ = 97733960.

The previous prime is 161261063. The next prime is 161261069. The reversal of 161261067 is 760162161.

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

It is a cyclic number.

It is not a de Polignac number, because 161261067 - 2² = 161261063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161261063) 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 7 ways as a sum of consecutive naturals, for example, 2443317 + ... + 2443382.

It is an arithmetic number, because the mean of its divisors is an integer number (29320200).

Almost surely, 2^161261067 is an apocalyptic number.

161261067 is a deficient number, since it is larger than the sum of its proper divisors (73300533).

161261067 is a wasteful number, since it uses less digits than its factorization.

161261067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886713.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 161261067 is about 12698.8608544231. The cubic root of 161261067 is about 544.3060685294.

The spelling of 161261067 in words is "one hundred sixty-one million, two hundred sixty-one thousand, sixty-seven".