1171608253 has 4 divisors (see below), whose sum is σ = 1191466080. Its totient is φ = 1151750428.

The previous prime is 1171608241. The next prime is 1171608257. The reversal of 1171608253 is 3528061711.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1171608253 - 2²⁵ = 1138053821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171608257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9928825 + ... + 9928942.

It is an arithmetic number, because the mean of its divisors is an integer number (297866520).

Almost surely, 2^1171608253 is an apocalyptic number.

It is an amenable number.

1171608253 is a deficient number, since it is larger than the sum of its proper divisors (19857827).

1171608253 is an equidigital number, since it uses as much as digits as its factorization.

1171608253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19857826.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1171608253 is about 34228.7635330288. The cubic root of 1171608253 is about 1054.2108315540.

Adding to 1171608253 its reverse (3528061711), we get a palindrome (4699669964).

The spelling of 1171608253 in words is "one billion, one hundred seventy-one million, six hundred eight thousand, two hundred fifty-three".