1309446 has 40 divisors (see below), whose sum is σ = 3005640. Its totient is φ = 425952.

The previous prime is 1309421. The next prime is 1309463. The reversal of 1309446 is 6449031.

1309446 = 119² + 120² + ... + 177².

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9490 + ... + 9626.

It is an arithmetic number, because the mean of its divisors is an integer number (75141).

2^1309446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502820).

1309446 is an abundant number, since it is smaller than the sum of its proper divisors (1696194).

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

1309446 is a wasteful number, since it uses less digits than its factorization.

1309446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1309446 is about 1144.3102726097. The cubic root of 1309446 is about 109.4029915840.

The spelling of 1309446 in words is "one million, three hundred nine thousand, four hundred forty-six".