1125008781 has 16 divisors (see below), whose sum is σ = 1617188160. Its totient is φ = 691545600.

The previous prime is 1125008749. The next prime is 1125008783. The reversal of 1125008781 is 1878005211.

It is not a de Polignac number, because 1125008781 - 2⁵ = 1125008749 is a prime.

It is a super-2 number, since 2×1125008781² = 2531289514654211922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125008783) 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 15 ways as a sum of consecutive naturals, for example, 20706 + ... + 51756.

It is an arithmetic number, because the mean of its divisors is an integer number (101074260).

Almost surely, 2^1125008781 is an apocalyptic number.

It is an amenable number.

1125008781 is a deficient number, since it is larger than the sum of its proper divisors (492179379).

1125008781 is a wasteful number, since it uses less digits than its factorization.

1125008781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31996.

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 1125008781 is about 33541.1505616608. The cubic root of 1125008781 is about 1040.0446174768.

The spelling of 1125008781 in words is "one billion, one hundred twenty-five million, eight thousand, seven hundred eighty-one".