135353421 has 12 divisors (see below), whose sum is σ = 223440672. Its totient is φ = 77344776.

The previous prime is 135353399. The next prime is 135353443. The reversal of 135353421 is 124353531.

It is an interprime number because it is at equal distance from previous prime (135353399) and next prime (135353443).

It is not a de Polignac number, because 135353421 - 2⁶ = 135353357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135353221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1074171 + ... + 1074296.

It is an arithmetic number, because the mean of its divisors is an integer number (18620056).

Almost surely, 2^135353421 is an apocalyptic number.

It is an amenable number.

135353421 is a deficient number, since it is larger than the sum of its proper divisors (88087251).

135353421 is a wasteful number, since it uses less digits than its factorization.

135353421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148480 (or 2148477 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 135353421 is about 11634.1489160144. The cubic root of 135353421 is about 513.4400542249.

The spelling of 135353421 in words is "one hundred thirty-five million, three hundred fifty-three thousand, four hundred twenty-one".