161406541 has 8 divisors (see below), whose sum is σ = 163113984. Its totient is φ = 159706560.

The previous prime is 161406529. The next prime is 161406587. The reversal of 161406541 is 145604161.

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 161406541 - 2⁹ = 161406029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161406521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48565 + ... + 51781.

It is an arithmetic number, because the mean of its divisors is an integer number (20389248).

Almost surely, 2^161406541 is an apocalyptic number.

It is an amenable number.

161406541 is a deficient number, since it is larger than the sum of its proper divisors (1707443).

161406541 is a wasteful number, since it uses less digits than its factorization.

161406541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 161406541 is about 12704.5873998332. The cubic root of 161406541 is about 544.4696926126.

The spelling of 161406541 in words is "one hundred sixty-one million, four hundred six thousand, five hundred forty-one".