1125144621 has 8 divisors (see below), whose sum is σ = 1666880960. Its totient is φ = 750096396.

The previous prime is 1125144619. The next prime is 1125144637. The reversal of 1125144621 is 1264415211.

1125144621 is a `hidden beast` number, since 1 + 1 + 25 + 14 + 4 + 621 = 666.

It is not a de Polignac number, because 1125144621 - 2¹ = 1125144619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41672023 = 1125144621 / (1 + 1 + 2 + 5 + 1 + 4 + 4 + 6 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125144121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20835985 + ... + 20836038.

It is an arithmetic number, because the mean of its divisors is an integer number (208360120).

Almost surely, 2^1125144621 is an apocalyptic number.

It is an amenable number.

1125144621 is a deficient number, since it is larger than the sum of its proper divisors (541736339).

1125144621 is an equidigital number, since it uses as much as digits as its factorization.

1125144621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41672032 (or 41672026 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1125144621 is about 33543.1754757954. The cubic root of 1125144621 is about 1040.0864761057.

Adding to 1125144621 its reverse (1264415211), we get a palindrome (2389559832).

The spelling of 1125144621 in words is "one billion, one hundred twenty-five million, one hundred forty-four thousand, six hundred twenty-one".