1260691 has 2 divisors, whose sum is σ = 1260692. Its totient is φ = 1260690.

The previous prime is 1260673. The next prime is 1260713. The reversal of 1260691 is 1960621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1260691 - 2¹¹ = 1258643 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1260641) 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, 630345 + 630346.

It is an arithmetic number, because the mean of its divisors is an integer number (630346).

2^1260691 is an apocalyptic number.

1260691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260691 is an equidigital number, since it uses as much as digits as its factorization.

1260691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1260691 is about 1122.8049697076. The cubic root of 1260691 is about 108.0279705789.

The spelling of 1260691 in words is "one million, two hundred sixty thousand, six hundred ninety-one".