1300000 has 72 divisors (see below), whose sum is σ = 3445092. Its totient is φ = 480000.

The previous prime is 1299989. The next prime is 1300021. The reversal of 1300000 is 31.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 355216 + 944784 = 596^2 + 972^2 .

It is a Harshad number since it is a multiple of its sum of digits (4).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99994 + ... + 100006.

2^1300000 is an apocalyptic number.

1300000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722546).

1300000 is an abundant number, since it is smaller than the sum of its proper divisors (2145092).

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

1300000 is an frugal number, since it uses more digits than its factorization.

1300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 3, while the sum is 4.

The square root of 1300000 is about 1140.1754250991. The cubic root of 1300000 is about 109.1392883061.

Adding to 1300000 its reverse (31), we get a palindrome (1300031).

The spelling of 1300000 in words is "one million, three hundred thousand".