161420061 has 16 divisors (see below), whose sum is σ = 242890560. Its totient is φ = 94456320.

The previous prime is 161420023. The next prime is 161420071. The reversal of 161420061 is 160024161.

It is not a de Polignac number, because 161420061 - 2⁶ = 161419997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161420071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83380 + ... + 85293.

It is an arithmetic number, because the mean of its divisors is an integer number (15180660).

Almost surely, 2^161420061 is an apocalyptic number.

161420061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161420061 is a deficient number, since it is larger than the sum of its proper divisors (81470499).

161420061 is a wasteful number, since it uses less digits than its factorization.

161420061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168716.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 161420061 is about 12705.1194799577. The cubic root of 161420061 is about 544.4848944432.

The spelling of 161420061 in words is "one hundred sixty-one million, four hundred twenty thousand, sixty-one".