161042960 has 40 divisors (see below), whose sum is σ = 403229400. Its totient is φ = 59461632.

The previous prime is 161042933. The next prime is 161042963. The reversal of 161042960 is 69240161.

It can be written as a sum of positive squares in 4 ways, for example, as 32809984 + 128232976 = 5728^2 + 11324^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (161042963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76385 + ... + 78464.

It is an arithmetic number, because the mean of its divisors is an integer number (10080735).

Almost surely, 2^161042960 is an apocalyptic number.

161042960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161042960 is an abundant number, since it is smaller than the sum of its proper divisors (242186440).

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

161042960 is a wasteful number, since it uses less digits than its factorization.

161042960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154875 (or 154869 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 161042960 is about 12690.2702886897. The cubic root of 161042960 is about 544.0605649120.

The spelling of 161042960 in words is "one hundred sixty-one million, forty-two thousand, nine hundred sixty".