1271659 has 2 divisors, whose sum is σ = 1271660. Its totient is φ = 1271658.

The previous prime is 1271657. The next prime is 1271671. The reversal of 1271659 is 9561721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1271659 - 2¹ = 1271657 is a prime.

It is a super-2 number, since 2×1271659² = 3234233224562, which contains 22 as substring.

Together with 1271657, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1271659.

It is not a weakly prime, because it can be changed into another prime (1271657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635829 + 635830.

It is an arithmetic number, because the mean of its divisors is an integer number (635830).

2^1271659 is an apocalyptic number.

1271659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271659 is an equidigital number, since it uses as much as digits as its factorization.

1271659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 1271659 is about 1127.6785889605. The cubic root of 1271659 is about 108.3403472119.

The spelling of 1271659 in words is "one million, two hundred seventy-one thousand, six hundred fifty-nine".