1243506 has 32 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 370640.

The previous prime is 1243483. The next prime is 1243511. The reversal of 1243506 is 6053421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5365 + ... + 5591.

It is an arithmetic number, because the mean of its divisors is an integer number (86184).

2^1243506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378944).

1243506 is an abundant number, since it is smaller than the sum of its proper divisors (1514382).

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

1243506 is a wasteful number, since it uses less digits than its factorization.

1243506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

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

The square root of 1243506 is about 1115.1260018491. The cubic root of 1243506 is about 107.5348652009.

Adding to 1243506 its reverse (6053421), we get a palindrome (7296927).

The spelling of 1243506 in words is "one million, two hundred forty-three thousand, five hundred six".