1172342553 has 4 divisors (see below), whose sum is σ = 1563123408. Its totient is φ = 781561700.

The previous prime is 1172342539. The next prime is 1172342581. The reversal of 1172342553 is 3552432711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3552432711 = 3 ⋅1184144237.

It is a cyclic number.

It is not a de Polignac number, because 1172342553 - 2⁶ = 1172342489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1172342953) 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 3 ways as a sum of consecutive naturals, for example, 195390423 + ... + 195390428.

It is an arithmetic number, because the mean of its divisors is an integer number (390780852).

Almost surely, 2^1172342553 is an apocalyptic number.

It is an amenable number.

1172342553 is a deficient number, since it is larger than the sum of its proper divisors (390780855).

1172342553 is an equidigital number, since it uses as much as digits as its factorization.

1172342553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390780854.

The product of its digits is 25200, while the sum is 33.

The square root of 1172342553 is about 34239.4882117125. The cubic root of 1172342553 is about 1054.4310261299.

The spelling of 1172342553 in words is "one billion, one hundred seventy-two million, three hundred forty-two thousand, five hundred fifty-three".