1127125261 has 4 divisors (see below), whose sum is σ = 1127259900. Its totient is φ = 1126990624.

The previous prime is 1127125229. The next prime is 1127125273. The reversal of 1127125261 is 1625217211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 665949636 + 461175625 = 25806^2 + 21475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1127125261 - 2⁵ = 1127125229 is a prime.

It is a super-2 number, since 2×1127125261² = 2540822707968636242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1127125061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53866 + ... + 71803.

It is an arithmetic number, because the mean of its divisors is an integer number (281814975).

Almost surely, 2^1127125261 is an apocalyptic number.

It is an amenable number.

1127125261 is a deficient number, since it is larger than the sum of its proper divisors (134639).

1127125261 is an equidigital number, since it uses as much as digits as its factorization.

1127125261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134638.

The product of its digits is 1680, while the sum is 28.

The square root of 1127125261 is about 33572.6862344972. The cubic root of 1127125261 is about 1040.6964211830.

The spelling of 1127125261 in words is "one billion, one hundred twenty-seven million, one hundred twenty-five thousand, two hundred sixty-one".