135466321 has 9 divisors (see below), whose sum is σ = 138015579. Its totient is φ = 132963936.

The previous prime is 135466307. The next prime is 135466327. The reversal of 135466321 is 123664531.

The square root of 135466321 is 11639.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2387025 + 133079296 = 1545^2 + 11536^2 .

It is not a de Polignac number, because 135466321 - 2⁷ = 135466193 is a prime.

It is a super-2 number, since 2×135466321² = 36702248250550082, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (12960) is a multiple of the sum of its prime divisors (216).

It is not an unprimeable number, because it can be changed into a prime (135466327) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1198761 + ... + 1198873.

Almost surely, 2^135466321 is an apocalyptic number.

135466321 is the 11639-th square number.

135466321 is the 5820-th centered octagonal number.

It is an amenable number.

135466321 is a deficient number, since it is larger than the sum of its proper divisors (2549258).

135466321 is an frugal number, since it uses more digits than its factorization.

135466321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 216 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The cubic root of 135466321 is about 513.5827701658.

The spelling of 135466321 in words is "one hundred thirty-five million, four hundred sixty-six thousand, three hundred twenty-one".