1244042420 has 12 divisors (see below), whose sum is σ = 2612489124. Its totient is φ = 497616960.

The previous prime is 1244042383. The next prime is 1244042441. The reversal of 1244042420 is 242404421.

It can be written as a sum of positive squares in 2 ways, for example, as 792309904 + 451732516 = 28148^2 + 21254^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31101041 + ... + 31101080.

It is an arithmetic number, because the mean of its divisors is an integer number (217707427).

Almost surely, 2^1244042420 is an apocalyptic number.

1244042420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244042420 is an abundant number, since it is smaller than the sum of its proper divisors (1368446704).

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

1244042420 is a wasteful number, since it uses less digits than its factorization.

1244042420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62202130 (or 62202128 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 1244042420 is about 35270.9855263501. The cubic root of 1244042420 is about 1075.5032567039.

Adding to 1244042420 its reverse (242404421), we get a palindrome (1486446841).

The spelling of 1244042420 in words is "one billion, two hundred forty-four million, forty-two thousand, four hundred twenty".