1125775231 has 8 divisors (see below), whose sum is σ = 1302102144. Its totient is φ = 953323800.

The previous prime is 1125775193. The next prime is 1125775247. The reversal of 1125775231 is 1325775211.

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 1125775231 - 2⁷ = 1125775103 is a prime.

It is a super-2 number, since 2×1125775231² = 2534739741466206722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125775291) 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, 968245 + ... + 969406.

It is an arithmetic number, because the mean of its divisors is an integer number (162762768).

Almost surely, 2^1125775231 is an apocalyptic number.

1125775231 is a deficient number, since it is larger than the sum of its proper divisors (176326913).

1125775231 is an equidigital number, since it uses as much as digits as its factorization.

1125775231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937741.

The product of its digits is 14700, while the sum is 34.

The square root of 1125775231 is about 33552.5741337382. The cubic root of 1125775231 is about 1040.2807522971.

The spelling of 1125775231 in words is "one billion, one hundred twenty-five million, seven hundred seventy-five thousand, two hundred thirty-one".