1125411421 has 4 divisors (see below), whose sum is σ = 1125665632. Its totient is φ = 1125157212.

The previous prime is 1125411377. The next prime is 1125411431. The reversal of 1125411421 is 1241145211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1241145211 = 359 ⋅3457229.

It is a cyclic number.

It is not a de Polignac number, because 1125411421 - 2²³ = 1117022813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1125411392 and 1125411401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125411431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120345 + ... + 129358.

It is an arithmetic number, because the mean of its divisors is an integer number (281416408).

Almost surely, 2^1125411421 is an apocalyptic number.

It is an amenable number.

1125411421 is a deficient number, since it is larger than the sum of its proper divisors (254211).

1125411421 is an equidigital number, since it uses as much as digits as its factorization.

1125411421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254210.

The product of its digits is 320, while the sum is 22.

The square root of 1125411421 is about 33547.1522040247. The cubic root of 1125411421 is about 1040.1686798022.

Adding to 1125411421 its reverse (1241145211), we get a palindrome (2366556632).

The spelling of 1125411421 in words is "one billion, one hundred twenty-five million, four hundred eleven thousand, four hundred twenty-one".