1211659 has 2 divisors, whose sum is σ = 1211660. Its totient is φ = 1211658.

The previous prime is 1211657. The next prime is 1211669. The reversal of 1211659 is 9561121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9561121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211659 - 2¹ = 1211657 is a prime.

Together with 1211657, it forms a pair of twin primes.

1211659 is a lucky number.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1211653) 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, 605829 + 605830.

It is an arithmetic number, because the mean of its divisors is an integer number (605830).

2^1211659 is an apocalyptic number.

1211659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211659 is an equidigital number, since it uses as much as digits as its factorization.

1211659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 1211659 is about 1100.7538326075. The cubic root of 1211659 is about 106.6089021004.

The spelling of 1211659 in words is "one million, two hundred eleven thousand, six hundred fifty-nine".