1125551771 has 8 divisors (see below), whose sum is σ = 1130402784. Its totient is φ = 1120711680.

The previous prime is 1125551753. The next prime is 1125551783. The reversal of 1125551771 is 1771555211.

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 1125551771 - 2¹⁴ = 1125535387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125551701) 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, 252266 + ... + 256688.

It is an arithmetic number, because the mean of its divisors is an integer number (141300348).

Almost surely, 2^1125551771 is an apocalyptic number.

1125551771 is a deficient number, since it is larger than the sum of its proper divisors (4851013).

1125551771 is an equidigital number, since it uses as much as digits as its factorization.

1125551771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5461.

The product of its digits is 12250, while the sum is 35.

The square root of 1125551771 is about 33549.2439706173. The cubic root of 1125551771 is about 1040.2119177989.

The spelling of 1125551771 in words is "one billion, one hundred twenty-five million, five hundred fifty-one thousand, seven hundred seventy-one".