135440254 has 4 divisors (see below), whose sum is σ = 203160384. Its totient is φ = 67720126.

The previous prime is 135440251. The next prime is 135440297. The reversal of 135440254 is 452044531.

135440254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 452044531 = 271 ⋅1668061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135440251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33860062 + ... + 33860065.

It is an arithmetic number, because the mean of its divisors is an integer number (50790096).

Almost surely, 2^135440254 is an apocalyptic number.

135440254 is a deficient number, since it is larger than the sum of its proper divisors (67720130).

135440254 is an equidigital number, since it uses as much as digits as its factorization.

135440254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67720129.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 135440254 is about 11637.8801334264. The cubic root of 135440254 is about 513.5498261327.

Adding to 135440254 its reverse (452044531), we get a palindrome (587484785).

The spelling of 135440254 in words is "one hundred thirty-five million, four hundred forty thousand, two hundred fifty-four".