134928021 has 8 divisors (see below), whose sum is σ = 181685664. Its totient is φ = 89061200.

The previous prime is 134927999. The next prime is 134928029. The reversal of 134928021 is 120829431.

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

It is a cyclic number.

It is not a de Polignac number, because 134928021 - 2⁶ = 134927957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 134928021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134928029) 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, 222351 + ... + 222956.

It is an arithmetic number, because the mean of its divisors is an integer number (22710708).

Almost surely, 2^134928021 is an apocalyptic number.

It is an amenable number.

134928021 is a deficient number, since it is larger than the sum of its proper divisors (46757643).

134928021 is a wasteful number, since it uses less digits than its factorization.

134928021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445411.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 134928021 is about 11615.8521426540. The cubic root of 134928021 is about 512.9015956770.

The spelling of 134928021 in words is "one hundred thirty-four million, nine hundred twenty-eight thousand, twenty-one".