1247969 has 2 divisors, whose sum is σ = 1247970. Its totient is φ = 1247968.

The previous prime is 1247959. The next prime is 1248001. The reversal of 1247969 is 9697421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 508369 = 860^2 + 713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247969 is a prime.

It is a super-2 number, since 2×1247969² = 3114853249922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1247959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623984 + 623985.

It is an arithmetic number, because the mean of its divisors is an integer number (623985).

2^1247969 is an apocalyptic number.

It is an amenable number.

1247969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247969 is an equidigital number, since it uses as much as digits as its factorization.

1247969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 1247969 is about 1117.1253286897. The cubic root of 1247969 is about 107.6633607836.

The spelling of 1247969 in words is "one million, two hundred forty-seven thousand, nine hundred sixty-nine".