1967261 has 2 divisors, whose sum is σ = 1967262. Its totient is φ = 1967260.

The previous prime is 1967243. The next prime is 1967263. The reversal of 1967261 is 1627691.

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., 1943236 + 24025 = 1394^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1967261 is a prime.

It is a Sophie Germain prime.

Together with 1967263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1967263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983630 + 983631.

It is an arithmetic number, because the mean of its divisors is an integer number (983631).

2^1967261 is an apocalyptic number.

It is an amenable number.

1967261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1967261 is an equidigital number, since it uses as much as digits as its factorization.

1967261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1967261 is about 1402.5908170240. The cubic root of 1967261 is about 125.3008433653.

The spelling of 1967261 in words is "one million, nine hundred sixty-seven thousand, two hundred sixty-one".