1269641 has 2 divisors, whose sum is σ = 1269642. Its totient is φ = 1269640.

The previous prime is 1269601. The next prime is 1269643. The reversal of 1269641 is 1469621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 92416 = 1085^2 + 304^2 .

It is an emirp because it is prime and its reverse (1469621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1269641 - 2¹⁸ = 1007497 is a prime.

It is a super-2 number, since 2×1269641² = 3223976537762, which contains 22 as substring.

Together with 1269643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1269643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634820 + 634821.

It is an arithmetic number, because the mean of its divisors is an integer number (634821).

2^1269641 is an apocalyptic number.

It is an amenable number.

1269641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269641 is an equidigital number, since it uses as much as digits as its factorization.

1269641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1269641 is about 1126.7834752072. The cubic root of 1269641 is about 108.2830083154.

The spelling of 1269641 in words is "one million, two hundred sixty-nine thousand, six hundred forty-one".