1253555441 has 4 divisors (see below), whose sum is σ = 1254431652. Its totient is φ = 1252679232.

The previous prime is 1253555399. The next prime is 1253555473. The reversal of 1253555441 is 1445553521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1445553521 = 4021 ⋅359501.

It can be written as a sum of positive squares in 2 ways, for example, as 1048464400 + 205091041 = 32380^2 + 14321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253555441 - 2¹⁰ = 1253554417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253555141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435956 + ... + 438821.

It is an arithmetic number, because the mean of its divisors is an integer number (313607913).

Almost surely, 2^1253555441 is an apocalyptic number.

It is an amenable number.

1253555441 is a deficient number, since it is larger than the sum of its proper divisors (876211).

1253555441 is an equidigital number, since it uses as much as digits as its factorization.

1253555441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876210.

The product of its digits is 60000, while the sum is 35.

The square root of 1253555441 is about 35405.5848843089. The cubic root of 1253555441 is about 1078.2377069273.

It can be divided in two parts, 12535 and 55441, that added together give a palindrome (67976).

The spelling of 1253555441 in words is "one billion, two hundred fifty-three million, five hundred fifty-five thousand, four hundred forty-one".