135521464 has 16 divisors (see below), whose sum is σ = 273649320. Its totient is φ = 62548320.

The previous prime is 135521461. The next prime is 135521473. The reversal of 135521464 is 464125531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135521461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651442 + ... + 651649.

Almost surely, 2^135521464 is an apocalyptic number.

It is an amenable number.

135521464 is an abundant number, since it is smaller than the sum of its proper divisors (138127856).

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

135521464 is a wasteful number, since it uses less digits than its factorization.

135521464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303110 (or 1303106 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 135521464 is about 11641.3686480585. The cubic root of 135521464 is about 513.6524471468.

Adding to 135521464 its reverse (464125531), we get a palindrome (599646995).

The spelling of 135521464 in words is "one hundred thirty-five million, five hundred twenty-one thousand, four hundred sixty-four".