1244405 has 8 divisors (see below), whose sum is σ = 1572000. Its totient is φ = 943056.

The previous prime is 1244401. The next prime is 1244423. The reversal of 1244405 is 5044421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244405 - 2² = 1244401 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6455 + ... + 6644.

It is an arithmetic number, because the mean of its divisors is an integer number (196500).

2^1244405 is an apocalyptic number.

It is an amenable number.

1244405 is a deficient number, since it is larger than the sum of its proper divisors (327595).

1244405 is a wasteful number, since it uses less digits than its factorization.

1244405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13123.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1244405 is about 1115.5290224822. The cubic root of 1244405 is about 107.5607732802.

Adding to 1244405 its reverse (5044421), we get a palindrome (6288826).

The spelling of 1244405 in words is "one million, two hundred forty-four thousand, four hundred five".