3181961 has 4 divisors (see below), whose sum is σ = 3242052. Its totient is φ = 3121872.

The previous prime is 3181951. The next prime is 3181973. The reversal of 3181961 is 1691813.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 732736 = 1565^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 3181961 - 2¹⁰ = 3180937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3181901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29966 + ... + 30071.

It is an arithmetic number, because the mean of its divisors is an integer number (810513).

Almost surely, 2^3181961 is an apocalyptic number.

It is an amenable number.

3181961 is a deficient number, since it is larger than the sum of its proper divisors (60091).

3181961 is an equidigital number, since it uses as much as digits as its factorization.

3181961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60090.

The product of its digits is 1296, while the sum is 29.

The square root of 3181961 is about 1783.8052023694. The cubic root of 3181961 is about 147.0838369781.

The spelling of 3181961 in words is "three million, one hundred eighty-one thousand, nine hundred sixty-one".