2981761 has 2 divisors, whose sum is σ = 2981762.
Its totient is φ = 2981760.
The previous prime is 2981753. The next prime is 2981773. The reversal of 2981761 is 1671892.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1577536 + 1404225 = 1256^2 + 1185^2
It is a cyclic number.
It is not a de Polignac number, because 2981761 - 23 = 2981753 is a prime.
It is a super-2 number, since 2×29817612 = 17781797322242, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (2981711) 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 as a sum of consecutive naturals, namely, 1490880 + 1490881.
It is an arithmetic number, because the mean of its divisors is an integer number (1490881).
22981761 is an apocalyptic number.
It is an amenable number.
2981761 is a deficient number, since it is larger than the sum of its proper divisors (1).
2981761 is an equidigital number, since it uses as much as digits as its factorization.
2981761 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6048, while the sum is 34.
The square root of 2981761 is about 1726.7776347868.
Note that the first 3 decimals coincide.
The cubic root of 2981761 is about 143.9320828126.
The spelling of 2981761 in words is "two million, nine hundred eighty-one thousand, seven hundred sixty-one".