135012440 has 32 divisors (see below), whose sum is σ = 313580160. Its totient is φ = 52262400.

The previous prime is 135012439. The next prime is 135012443. The reversal of 135012440 is 44210531.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135012443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53201 + ... + 55680.

It is an arithmetic number, because the mean of its divisors is an integer number (9799380).

Almost surely, 2^135012440 is an apocalyptic number.

135012440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135012440 is an abundant number, since it is smaller than the sum of its proper divisors (178567720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135012440 is a wasteful number, since it uses less digits than its factorization.

135012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108923 (or 108919 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 135012440 is about 11619.4853586551. The cubic root of 135012440 is about 513.0085406307.

Adding to 135012440 its reverse (44210531), we get a palindrome (179222971).

The spelling of 135012440 in words is "one hundred thirty-five million, twelve thousand, four hundred forty".