134040021 has 16 divisors (see below), whose sum is σ = 190014336. Its totient is φ = 83859776.

The previous prime is 134040017. The next prime is 134040031. The reversal of 134040021 is 120040431.

It is a cyclic number.

It is not a de Polignac number, because 134040021 - 2² = 134040017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134040031) 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, 14670 + ... + 21983.

It is an arithmetic number, because the mean of its divisors is an integer number (11875896).

Almost surely, 2^134040021 is an apocalyptic number.

It is an amenable number.

134040021 is a deficient number, since it is larger than the sum of its proper divisors (55974315).

134040021 is a wasteful number, since it uses less digits than its factorization.

134040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36732.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 134040021 is about 11577.5654176515. The cubic root of 134040021 is about 511.7739340630.

Adding to 134040021 its reverse (120040431), we get a palindrome (254080452).

The spelling of 134040021 in words is "one hundred thirty-four million, forty thousand, twenty-one".