1125888621 has 32 divisors (see below), whose sum is σ = 1766136960. Its totient is φ = 628972800.

The previous prime is 1125888613. The next prime is 1125888623. The reversal of 1125888621 is 1268885211.

1125888621 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1125888621 - 2³ = 1125888613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125888623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402295 + ... + 405083.

It is an arithmetic number, because the mean of its divisors is an integer number (55191780).

Almost surely, 2^1125888621 is an apocalyptic number.

1125888621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1125888621 is a deficient number, since it is larger than the sum of its proper divisors (640248339).

1125888621 is a wasteful number, since it uses less digits than its factorization.

1125888621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757.

The product of its digits is 61440, while the sum is 42.

The square root of 1125888621 is about 33554.2638274184. The cubic root of 1125888621 is about 1040.3156774080.

The spelling of 1125888621 in words is "one billion, one hundred twenty-five million, eight hundred eighty-eight thousand, six hundred twenty-one".