1244420405 has 16 divisors (see below), whose sum is σ = 1560746880. Its totient is φ = 950714688.

The previous prime is 1244420377. The next prime is 1244420449. The reversal of 1244420405 is 5040244421.

It is a cyclic number.

It is not a de Polignac number, because 1244420405 - 2⁶ = 1244420341 is a prime.

It is a congruent 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, 65531 + ... + 82359.

It is an arithmetic number, because the mean of its divisors is an integer number (97546680).

Almost surely, 2^1244420405 is an apocalyptic number.

It is an amenable number.

1244420405 is a deficient number, since it is larger than the sum of its proper divisors (316326475).

1244420405 is a wasteful number, since it uses less digits than its factorization.

1244420405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1244420405 is about 35276.3434187842. The cubic root of 1244420405 is about 1075.6121712465.

Adding to 1244420405 its reverse (5040244421), we get a palindrome (6284664826).

The spelling of 1244420405 in words is "one billion, two hundred forty-four million, four hundred twenty thousand, four hundred five".