1172155263 has 16 divisors (see below), whose sum is σ = 1629511680. Its totient is φ = 748542816.

The previous prime is 1172155247. The next prime is 1172155289. The reversal of 1172155263 is 3625512711.

It is not a de Polignac number, because 1172155263 - 2⁴ = 1172155247 is a prime.

It is a super-3 number, since 3×1172155263³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172155213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41995 + ... + 64092.

It is an arithmetic number, because the mean of its divisors is an integer number (101844480).

Almost surely, 2^1172155263 is an apocalyptic number.

1172155263 is a deficient number, since it is larger than the sum of its proper divisors (457356417).

1172155263 is a wasteful number, since it uses less digits than its factorization.

1172155263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106246.

The product of its digits is 12600, while the sum is 33.

The square root of 1172155263 is about 34236.7531024775. The cubic root of 1172155263 is about 1054.3748722058.

Adding to 1172155263 its reverse (3625512711), we get a palindrome (4797667974).

The spelling of 1172155263 in words is "one billion, one hundred seventy-two million, one hundred fifty-five thousand, two hundred sixty-three".