3161000 has 64 divisors (see below), whose sum is σ = 7722000. Its totient is φ = 1209600.

The previous prime is 3160979. The next prime is 3161003. The reversal of 3161000 is 1613.

It can be written as a sum of positive squares in 8 ways, for example, as 264196 + 2896804 = 514^2 + 1702^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3161003) 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, 28946 + ... + 29054.

Almost surely, 2^3161000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3161000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3861000).

3161000 is an abundant number, since it is smaller than the sum of its proper divisors (4561000).

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

3161000 is a wasteful number, since it uses less digits than its factorization.

3161000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 3161000 is about 1777.9201331893. The cubic root of 3161000 is about 146.7601561888.

Adding to 3161000 its reverse (1613), we get a palindrome (3162613).

The spelling of 3161000 in words is "three million, one hundred sixty-one thousand".