1249817 has 2 divisors, whose sum is σ = 1249818. Its totient is φ = 1249816.

The previous prime is 1249811. The next prime is 1249819. The reversal of 1249817 is 7189421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 59536 = 1091^2 + 244^2 .

It is an emirp because it is prime and its reverse (7189421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249817 - 2¹² = 1245721 is a prime.

Together with 1249819, 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 (1249811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624908 + 624909.

It is an arithmetic number, because the mean of its divisors is an integer number (624909).

2^1249817 is an apocalyptic number.

It is an amenable number.

1249817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249817 is an equidigital number, since it uses as much as digits as its factorization.

1249817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1249817 is about 1117.9521456664. The cubic root of 1249817 is about 107.7164774244.

The spelling of 1249817 in words is "one million, two hundred forty-nine thousand, eight hundred seventeen".