135801437 has 4 divisors (see below), whose sum is σ = 135873696. Its totient is φ = 135729180.

The previous prime is 135801427. The next prime is 135801503. The reversal of 135801437 is 734108531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135801437 - 2⁶ = 135801373 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 (135801427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33233 + ... + 37094.

It is an arithmetic number, because the mean of its divisors is an integer number (33968424).

Almost surely, 2^135801437 is an apocalyptic number.

It is an amenable number.

135801437 is a deficient number, since it is larger than the sum of its proper divisors (72259).

135801437 is an equidigital number, since it uses as much as digits as its factorization.

135801437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72258.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 135801437 is about 11653.3873616215. The cubic root of 135801437 is about 514.0059210409.

Adding to 135801437 its reverse (734108531), we get a palindrome (869909968).

The spelling of 135801437 in words is "one hundred thirty-five million, eight hundred one thousand, four hundred thirty-seven".