1956161 has 2 divisors, whose sum is σ = 1956162. Its totient is φ = 1956160.

The previous prime is 1956109. The next prime is 1956169. The reversal of 1956161 is 1616591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 65536 = 1375^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956161 - 2¹⁰ = 1955137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1956169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978080 + 978081.

It is an arithmetic number, because the mean of its divisors is an integer number (978081).

2^1956161 is an apocalyptic number.

It is an amenable number.

1956161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956161 is an equidigital number, since it uses as much as digits as its factorization.

1956161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 29.

The square root of 1956161 is about 1398.6282565428. The cubic root of 1956161 is about 125.0647344698.

The spelling of 1956161 in words is "one million, nine hundred fifty-six thousand, one hundred sixty-one".