135123501 has 8 divisors (see below), whose sum is σ = 184354720. Its totient is φ = 87987312.

The previous prime is 135123491. The next prime is 135123503. The reversal of 135123501 is 105321531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135123501 - 2¹⁴ = 135107117 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 (135123503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523606 + ... + 523863.

It is an arithmetic number, because the mean of its divisors is an integer number (23044340).

Almost surely, 2^135123501 is an apocalyptic number.

It is an amenable number.

135123501 is a deficient number, since it is larger than the sum of its proper divisors (49231219).

135123501 is a wasteful number, since it uses less digits than its factorization.

135123501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047515.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 135123501 is about 11624.2634605380. The cubic root of 135123501 is about 513.1491687242.

The spelling of 135123501 in words is "one hundred thirty-five million, one hundred twenty-three thousand, five hundred one".