1171025553 has 8 divisors (see below), whose sum is σ = 1563761088. Its totient is φ = 779486864.

The previous prime is 1171025521. The next prime is 1171025573. The reversal of 1171025553 is 3555201711.

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 1171025553 - 2⁵ = 1171025521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1171025553.

It is not an unprimeable number, because it can be changed into a prime (1171025573) 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, 296925 + ... + 300842.

It is an arithmetic number, because the mean of its divisors is an integer number (195470136).

Almost surely, 2^1171025553 is an apocalyptic number.

It is an amenable number.

1171025553 is a deficient number, since it is larger than the sum of its proper divisors (392735535).

1171025553 is an equidigital number, since it uses as much as digits as its factorization.

1171025553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598423.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 1171025553 is about 34220.2506273698. The cubic root of 1171025553 is about 1054.0360317956.

The spelling of 1171025553 in words is "one billion, one hundred seventy-one million, twenty-five thousand, five hundred fifty-three".