1247089 has 2 divisors, whose sum is σ = 1247090. Its totient is φ = 1247088.

The previous prime is 1247063. The next prime is 1247101. The reversal of 1247089 is 9807421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 400689 = 920^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247089 - 2⁷ = 1246961 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1247089.

It is not a weakly prime, because it can be changed into another prime (1247009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623544 + 623545.

It is an arithmetic number, because the mean of its divisors is an integer number (623545).

2^1247089 is an apocalyptic number.

It is an amenable number.

1247089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247089 is an equidigital number, since it uses as much as digits as its factorization.

1247089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1247089 is about 1116.7313911590. The cubic root of 1247089 is about 107.6380487137.

The spelling of 1247089 in words is "one million, two hundred forty-seven thousand, eighty-nine".