244842921 has 12 divisors (see below), whose sum is σ = 355708548. Its totient is φ = 162284064.

The previous prime is 244842893. The next prime is 244842937. The reversal of 244842921 is 129248442.

It can be written as a sum of positive squares in 2 ways, for example, as 104775696 + 140067225 = 10236^2 + 11835^2 .

It is not a de Polignac number, because 244842921 - 2¹³ = 244834729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (244842421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77070 + ... + 80183.

It is an arithmetic number, because the mean of its divisors is an integer number (29642379).

Almost surely, 2^244842921 is an apocalyptic number.

It is an amenable number.

244842921 is a deficient number, since it is larger than the sum of its proper divisors (110865627).

244842921 is a wasteful number, since it uses less digits than its factorization.

244842921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157432 (or 157429 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 244842921 is about 15647.4573333817. The cubic root of 244842921 is about 625.5987188607.

It can be divided in two parts, 2448 and 42921, that added together give a square (45369 = 213²).

The spelling of 244842921 in words is "two hundred forty-four million, eight hundred forty-two thousand, nine hundred twenty-one".