161007020 has 12 divisors (see below), whose sum is σ = 338114784. Its totient is φ = 64402800.

The previous prime is 161007013. The next prime is 161007023. The reversal of 161007020 is 20700161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161007020.

It is not an unprimeable number, because it can be changed into a prime (161007023) 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, 4025156 + ... + 4025195.

It is an arithmetic number, because the mean of its divisors is an integer number (28176232).

Almost surely, 2^161007020 is an apocalyptic number.

161007020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161007020 is an abundant number, since it is smaller than the sum of its proper divisors (177107764).

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

161007020 is a wasteful number, since it uses less digits than its factorization.

161007020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050360 (or 8050358 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 161007020 is about 12688.8541641868. The cubic root of 161007020 is about 544.0200891875.

Adding to 161007020 its reverse (20700161), we get a palindrome (181707181).

The spelling of 161007020 in words is "one hundred sixty-one million, seven thousand, twenty".