1125320413 has 4 divisors (see below), whose sum is σ = 1286080480. Its totient is φ = 964560348.

The previous prime is 1125320407. The next prime is 1125320447. The reversal of 1125320413 is 3140235211.

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: 3140235211 = 421 ⋅7458991.

It is a cyclic number.

It is not a de Polignac number, because 1125320413 - 2¹⁷ = 1125189341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125320453) 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, 80380023 + ... + 80380036.

It is an arithmetic number, because the mean of its divisors is an integer number (321520120).

Almost surely, 2^1125320413 is an apocalyptic number.

It is an amenable number.

1125320413 is a deficient number, since it is larger than the sum of its proper divisors (160760067).

1125320413 is an equidigital number, since it uses as much as digits as its factorization.

1125320413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160760066.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1125320413 is about 33545.7957574418. The cubic root of 1125320413 is about 1040.1406408050.

Adding to 1125320413 its reverse (3140235211), we get a palindrome (4265555624).

The spelling of 1125320413 in words is "one billion, one hundred twenty-five million, three hundred twenty thousand, four hundred thirteen".