1325133541 has 4 divisors (see below), whose sum is σ = 1325212812. Its totient is φ = 1325054272.

The previous prime is 1325133529. The next prime is 1325133559. The reversal of 1325133541 is 1453315231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1453315231 = 2957 ⋅491483.

It can be written as a sum of positive squares in 2 ways, for example, as 1162469025 + 162664516 = 34095^2 + 12754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325133541 - 2⁷ = 1325133413 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 (1325133521) 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, 3700 + ... + 51613.

It is an arithmetic number, because the mean of its divisors is an integer number (331303203).

Almost surely, 2^1325133541 is an apocalyptic number.

It is an amenable number.

1325133541 is a deficient number, since it is larger than the sum of its proper divisors (79271).

1325133541 is an equidigital number, since it uses as much as digits as its factorization.

1325133541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79270.

The product of its digits is 5400, while the sum is 28.

The square root of 1325133541 is about 36402.3837268935. The cubic root of 1325133541 is about 1098.3815154035.

Adding to 1325133541 its reverse (1453315231), we get a palindrome (2778448772).

The spelling of 1325133541 in words is "one billion, three hundred twenty-five million, one hundred thirty-three thousand, five hundred forty-one".