135021003 has 16 divisors (see below), whose sum is σ = 195046656. Its totient is φ = 82588320.

The previous prime is 135020959. The next prime is 135021023. The reversal of 135021003 is 300120531.

It is a happy number.

It is not a de Polignac number, because 135021003 - 2⁸ = 135020747 is a prime.

It is a super-2 number, since 2×135021003² = 36461342502252018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135021023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (12190416).

Almost surely, 2^135021003 is an apocalyptic number.

135021003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135021003 is a deficient number, since it is larger than the sum of its proper divisors (60025653).

135021003 is a wasteful number, since it uses less digits than its factorization.

135021003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20914.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 135021003 is about 11619.8538286848. The cubic root of 135021003 is about 513.0193860493.

Adding to 135021003 its reverse (300120531), we get a palindrome (435141534).

The spelling of 135021003 in words is "one hundred thirty-five million, twenty-one thousand, three".