1239569 has 2 divisors, whose sum is σ = 1239570. Its totient is φ = 1239568.

The previous prime is 1239551. The next prime is 1239583. The reversal of 1239569 is 9659321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236544 + 3025 = 1112^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239569 - 2¹² = 1235473 is a prime.

It is a super-2 number, since 2×1239569² = 3073062611522, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 1 + 2¹⁹ + 3¹² + 9 + 5⁷ + 6⁶ + 9⁵ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619784 + 619785.

It is an arithmetic number, because the mean of its divisors is an integer number (619785).

2^1239569 is an apocalyptic number.

It is an amenable number.

1239569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239569 is an equidigital number, since it uses as much as digits as its factorization.

1239569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 1239569 is about 1113.3593310338. The cubic root of 1239569 is about 107.4212583641.

The spelling of 1239569 in words is "one million, two hundred thirty-nine thousand, five hundred sixty-nine".