135212415 has 16 divisors (see below), whose sum is σ = 232981728. Its totient is φ = 66566016.

The previous prime is 135212411. The next prime is 135212431. The reversal of 135212415 is 514212531.

It is a happy number.

It is not a de Polignac number, because 135212415 - 2² = 135212411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135212411) 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, 346504 + ... + 346893.

It is an arithmetic number, because the mean of its divisors is an integer number (14561358).

Almost surely, 2^135212415 is an apocalyptic number.

135212415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135212415 is a deficient number, since it is larger than the sum of its proper divisors (97769313).

135212415 is a wasteful number, since it uses less digits than its factorization.

135212415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693418.

The product of its digits is 1200, while the sum is 24.

The square root of 135212415 is about 11628.0873319734. The cubic root of 135212415 is about 513.2616982271.

Adding to 135212415 its reverse (514212531), we get a palindrome (649424946).

It can be divided in two parts, 135 and 212415, that multiplied together give a square (28676025 = 5355²).

The spelling of 135212415 in words is "one hundred thirty-five million, two hundred twelve thousand, four hundred fifteen".