135123415 has 16 divisors (see below), whose sum is σ = 189623808. Its totient is φ = 90500256.

The previous prime is 135123403. The next prime is 135123427. The reversal of 135123415 is 514321531.

It is a happy number.

135123415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (135123403) and next prime (135123427).

It is not a de Polignac number, because 135123415 - 2¹³ = 135115223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135123415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43387 + ... + 46396.

It is an arithmetic number, because the mean of its divisors is an integer number (11851488).

Almost surely, 2^135123415 is an apocalyptic number.

135123415 is a deficient number, since it is larger than the sum of its proper divisors (54500393).

135123415 is an equidigital number, since it uses as much as digits as its factorization.

135123415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89838.

The product of its digits is 1800, while the sum is 25.

The square root of 135123415 is about 11624.2597613784. The cubic root of 135123415 is about 513.1490598587.

Adding to 135123415 its reverse (514321531), we get a palindrome (649444946).

The spelling of 135123415 in words is "one hundred thirty-five million, one hundred twenty-three thousand, four hundred fifteen".