1299726 has 40 divisors (see below), whose sum is σ = 2979504. Its totient is φ = 423360.

The previous prime is 1299721. The next prime is 1299743. The reversal of 1299726 is 6279921.

It is a super-3 number, since 3×1299726³ = 6586833338327487528, which contains 333 as substring.

Its product of digits (13608) is a multiple of the sum of its prime divisors (189).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11446 + ... + 11558.

2^1299726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489752).

1299726 is an abundant number, since it is smaller than the sum of its proper divisors (1679778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299726 is a wasteful number, since it uses less digits than its factorization.

1299726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 189 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 1299726 is about 1140.0552618185. The cubic root of 1299726 is about 109.1316200327.

It can be divided in two parts, 1299 and 726, that added together give a square (2025 = 45²).

The spelling of 1299726 in words is "one million, two hundred ninety-nine thousand, seven hundred twenty-six".