135421445 has 16 divisors (see below), whose sum is σ = 169344000. Its totient is φ = 103833408.

The previous prime is 135421441. The next prime is 135421453. The reversal of 135421445 is 544124531.

It is a cyclic number.

It is not a de Polignac number, because 135421445 - 2² = 135421441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16796 + ... + 23514.

It is an arithmetic number, because the mean of its divisors is an integer number (10584000).

Almost surely, 2^135421445 is an apocalyptic number.

135421445 is the 6719-th octagonal number.

It is an amenable number.

135421445 is a deficient number, since it is larger than the sum of its proper divisors (33922555).

135421445 is a wasteful number, since it uses less digits than its factorization.

135421445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892.

The product of its digits is 9600, while the sum is 29.

The square root of 135421445 is about 11637.0720114641. The cubic root of 135421445 is about 513.5260522901.

Adding to 135421445 its reverse (544124531), we get a palindrome (679545976).

The spelling of 135421445 in words is "one hundred thirty-five million, four hundred twenty-one thousand, four hundred forty-five".