1125321403 has 2 divisors, whose sum is σ = 1125321404. Its totient is φ = 1125321402.

The previous prime is 1125321397. The next prime is 1125321469. The reversal of 1125321403 is 3041235211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125321403 - 2⁵ = 1125321371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125321203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562660701 + 562660702.

It is an arithmetic number, because the mean of its divisors is an integer number (562660702).

Almost surely, 2^1125321403 is an apocalyptic number.

1125321403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125321403 is an equidigital number, since it uses as much as digits as its factorization.

1125321403 is an evil number, because the sum of its binary digits is even.

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

The square root of 1125321403 is about 33545.8105133860. The cubic root of 1125321403 is about 1040.1409458260.

Adding to 1125321403 its reverse (3041235211), we get a palindrome (4166556614).

The spelling of 1125321403 in words is "one billion, one hundred twenty-five million, three hundred twenty-one thousand, four hundred three".