1244255553 has 32 divisors (see below), whose sum is σ = 1874196480. Its totient is φ = 815734800.

The previous prime is 1244255539. The next prime is 1244255567. The reversal of 1244255553 is 3555524421.

1244255553 is a `hidden beast` number, since 12 + 4 + 42 + 55 + 553 = 666.

It is an interprime number because it is at equal distance from previous prime (1244255539) and next prime (1244255567).

It is not a de Polignac number, because 1244255553 - 2⁵ = 1244255521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244255513) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 418450 + ... + 421412.

It is an arithmetic number, because the mean of its divisors is an integer number (58568640).

Almost surely, 2^1244255553 is an apocalyptic number.

It is an amenable number.

1244255553 is a deficient number, since it is larger than the sum of its proper divisors (629940927).

1244255553 is a wasteful number, since it uses less digits than its factorization.

1244255553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3220 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 1244255553 is about 35274.0067613533. The cubic root of 1244255553 is about 1075.5646726553.

Adding to 1244255553 its reverse (3555524421), we get a palindrome (4799779974).

The spelling of 1244255553 in words is "one billion, two hundred forty-four million, two hundred fifty-five thousand, five hundred fifty-three".