135352021 has 8 divisors (see below), whose sum is σ = 155713664. Its totient is φ = 115246800.

The previous prime is 135351973. The next prime is 135352051. The reversal of 135352021 is 120253531.

135352021 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135352021 - 2²³ = 126963413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135351983 and 135352001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135352051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62970 + ... + 65083.

It is an arithmetic number, because the mean of its divisors is an integer number (19464208).

Almost surely, 2^135352021 is an apocalyptic number.

It is an amenable number.

135352021 is a deficient number, since it is larger than the sum of its proper divisors (20361643).

135352021 is a wasteful number, since it uses less digits than its factorization.

135352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128211.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 135352021 is about 11634.0887481573. The cubic root of 135352021 is about 513.4382839986.

The spelling of 135352021 in words is "one hundred thirty-five million, three hundred fifty-two thousand, twenty-one".