161012 has 6 divisors (see below), whose sum is σ = 281778. Its totient is φ = 80504.

The previous prime is 161009. The next prime is 161017. The reversal of 161012 is 210161.

It can be written as a sum of positive squares in only one way, i.e., 155236 + 5776 = 394^2 + 76^2 .

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 160984 and 161002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20123 + ... + 20130.

It is an arithmetic number, because the mean of its divisors is an integer number (46963).

2¹⁶¹⁰¹² is an apocalyptic number.

It is an amenable number.

161012 is a deficient number, since it is larger than the sum of its proper divisors (120766).

161012 is a wasteful number, since it uses less digits than its factorization.

161012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40257 (or 40255 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 161012 is about 401.2630060197. The cubic root of 161012 is about 54.4025698036.

Adding to 161012 its reverse (210161), we get a palindrome (371173).

The spelling of 161012 in words is "one hundred sixty-one thousand, twelve".