1405326 has 32 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 421344.

The previous prime is 1405319. The next prime is 1405333. The reversal of 1405326 is 6235041.

It is a happy number.

1405326 is a nontrivial binomial coefficient, being equal to C(1677, 2).

It is an interprime number because it is at equal distance from previous prime (1405319) and next prime (1405333).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3145 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2^1405326 is an apocalyptic number.

1405326 is the 1676-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1405326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552320).

1405326 is an abundant number, since it is smaller than the sum of its proper divisors (1699314).

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

1405326 is a wasteful number, since it uses less digits than its factorization.

1405326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1405326 is about 1185.4644659373. The cubic root of 1405326 is about 112.0105751069.

The spelling of 1405326 in words is "one million, four hundred five thousand, three hundred twenty-six".