3961121 has 2 divisors, whose sum is σ = 3961122. Its totient is φ = 3961120.

The previous prime is 3961057. The next prime is 3961147. The reversal of 3961121 is 1211693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 115600 = 1961^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 3961121 - 2⁶ = 3961057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3961171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980560 + 1980561.

It is an arithmetic number, because the mean of its divisors is an integer number (1980561).

Almost surely, 2^3961121 is an apocalyptic number.

It is an amenable number.

3961121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961121 is an equidigital number, since it uses as much as digits as its factorization.

3961121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 3961121 is about 1990.2565161305. The cubic root of 3961121 is about 158.2241251234.

The spelling of 3961121 in words is "three million, nine hundred sixty-one thousand, one hundred twenty-one".