1263239 has 2 divisors, whose sum is σ = 1263240. Its totient is φ = 1263238.

The previous prime is 1263209. The next prime is 1263247. The reversal of 1263239 is 9323621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263239 - 2¹² = 1259143 is a prime.

It is a super-2 number, since 2×1263239² = 3191545542242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631619 + 631620.

It is an arithmetic number, because the mean of its divisors is an integer number (631620).

2^1263239 is an apocalyptic number.

1263239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263239 is an equidigital number, since it uses as much as digits as its factorization.

1263239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 1263239 is about 1123.9390552873. The cubic root of 1263239 is about 108.1007005437.

The spelling of 1263239 in words is "one million, two hundred sixty-three thousand, two hundred thirty-nine".