120001535 has 4 divisors (see below), whose sum is σ = 144001848. Its totient is φ = 96001224.

The previous prime is 120001529. The next prime is 120001543. The reversal of 120001535 is 535100021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120001535 - 2²⁰ = 118952959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12000149 + ... + 12000158.

It is an arithmetic number, because the mean of its divisors is an integer number (36000462).

Almost surely, 2^120001535 is an apocalyptic number.

120001535 is a deficient number, since it is larger than the sum of its proper divisors (24000313).

120001535 is an equidigital number, since it uses as much as digits as its factorization.

120001535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24000312.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 120001535 is about 10954.5212127231. The cubic root of 120001535 is about 493.2445179880.

Adding to 120001535 its reverse (535100021), we get a palindrome (655101556).

The spelling of 120001535 in words is "one hundred twenty million, one thousand, five hundred thirty-five".