135206501 has 2 divisors, whose sum is σ = 135206502. Its totient is φ = 135206500.

The previous prime is 135206453. The next prime is 135206503. The reversal of 135206501 is 105602531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 15413476 = 10945^2 + 3926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135206501 is a prime.

Together with 135206503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135206503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67603250 + 67603251.

It is an arithmetic number, because the mean of its divisors is an integer number (67603251).

Almost surely, 2^135206501 is an apocalyptic number.

It is an amenable number.

135206501 is a deficient number, since it is larger than the sum of its proper divisors (1).

135206501 is an equidigital number, since it uses as much as digits as its factorization.

135206501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 135206501 is about 11627.8330311370. The cubic root of 135206501 is about 513.2542150042.

The spelling of 135206501 in words is "one hundred thirty-five million, two hundred six thousand, five hundred one".