135212501 has 4 divisors (see below), whose sum is σ = 135389100. Its totient is φ = 135035904.

The previous prime is 135212491. The next prime is 135212513. The reversal of 135212501 is 105212531.

It is a happy number.

135212501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105212531 = 421 ⋅249911.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 119924401 = 3910^2 + 10951^2 .

It is a cyclic number.

It is not a de Polignac number, because 135212501 - 2²² = 131018197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135212521) 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, 87146 + ... + 88683.

It is an arithmetic number, because the mean of its divisors is an integer number (33847275).

Almost surely, 2^135212501 is an apocalyptic number.

It is an amenable number.

135212501 is a deficient number, since it is larger than the sum of its proper divisors (176599).

135212501 is an equidigital number, since it uses as much as digits as its factorization.

135212501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176598.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 135212501 is about 11628.0910299154. The cubic root of 135212501 is about 513.2618070448.

The spelling of 135212501 in words is "one hundred thirty-five million, two hundred twelve thousand, five hundred one".