1231232775 has 48 divisors (see below), whose sum is σ = 2170099200. Its totient is φ = 614165760.

The previous prime is 1231232767. The next prime is 1231232777. The reversal of 1231232775 is 5772321321.

It is not a de Polignac number, because 1231232775 - 2³ = 1231232767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231232777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107107 + ... + 118043.

It is an arithmetic number, because the mean of its divisors is an integer number (45210400).

Almost surely, 2^1231232775 is an apocalyptic number.

1231232775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231232775 is a deficient number, since it is larger than the sum of its proper divisors (938866425).

1231232775 is a wasteful number, since it uses less digits than its factorization.

1231232775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048 (or 11043 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 1231232775 is about 35088.9266720998. The cubic root of 1231232775 is about 1071.7991030191.

The spelling of 1231232775 in words is "one billion, two hundred thirty-one million, two hundred thirty-two thousand, seven hundred seventy-five".