135225437 has 2 divisors, whose sum is σ = 135225438. Its totient is φ = 135225436.

The previous prime is 135225403. The next prime is 135225449. The reversal of 135225437 is 734522531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 13586596 = 11029^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 135225437 - 2¹² = 135221341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135225457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67612718 + 67612719.

It is an arithmetic number, because the mean of its divisors is an integer number (67612719).

Almost surely, 2^135225437 is an apocalyptic number.

It is an amenable number.

135225437 is a deficient number, since it is larger than the sum of its proper divisors (1).

135225437 is an equidigital number, since it uses as much as digits as its factorization.

135225437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 32.

The square root of 135225437 is about 11628.6472558075. The cubic root of 135225437 is about 513.2781747202.

Adding to 135225437 its reverse (734522531), we get a palindrome (869747968).

The spelling of 135225437 in words is "one hundred thirty-five million, two hundred twenty-five thousand, four hundred thirty-seven".