1253632555 has 8 divisors (see below), whose sum is σ = 1719267552. Its totient is φ = 859633728.

The previous prime is 1253632553. The next prime is 1253632613. The reversal of 1253632555 is 5552363521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1253632555 - 2¹ = 1253632553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253632553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17909002 + ... + 17909071.

It is an arithmetic number, because the mean of its divisors is an integer number (214908444).

Almost surely, 2^1253632555 is an apocalyptic number.

1253632555 is a deficient number, since it is larger than the sum of its proper divisors (465634997).

1253632555 is an equidigital number, since it uses as much as digits as its factorization.

1253632555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35818085.

The product of its digits is 135000, while the sum is 37.

The square root of 1253632555 is about 35406.6738765448. The cubic root of 1253632555 is about 1078.2598161788.

The spelling of 1253632555 in words is "one billion, two hundred fifty-three million, six hundred thirty-two thousand, five hundred fifty-five".