1269731 has 2 divisors, whose sum is σ = 1269732. Its totient is φ = 1269730.

The previous prime is 1269703. The next prime is 1269733. The reversal of 1269731 is 1379621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1379621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1269731 - 2¹⁴ = 1253347 is a prime.

It is a super-2 number, since 2×1269731² = 3224433624722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1269733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1269694 and 1269703.

It is not a weakly prime, because it can be changed into another prime (1269733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634865 + 634866.

It is an arithmetic number, because the mean of its divisors is an integer number (634866).

2^1269731 is an apocalyptic number.

1269731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269731 is an equidigital number, since it uses as much as digits as its factorization.

1269731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1269731 is about 1126.8234111874. The cubic root of 1269731 is about 108.2855668445.

The spelling of 1269731 in words is "one million, two hundred sixty-nine thousand, seven hundred thirty-one".