134487021 has 8 divisors (see below), whose sum is σ = 185100544. Its totient is φ = 86765760.

The previous prime is 134486939. The next prime is 134487043. The reversal of 134487021 is 120784431.

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

It is not a de Polignac number, because 134487021 - 2⁹ = 134486509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134487021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134487071) 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, 722956 + ... + 723141.

It is an arithmetic number, because the mean of its divisors is an integer number (23137568).

Almost surely, 2^134487021 is an apocalyptic number.

It is an amenable number.

134487021 is a deficient number, since it is larger than the sum of its proper divisors (50613523).

134487021 is a wasteful number, since it uses less digits than its factorization.

134487021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446131.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 134487021 is about 11596.8539268200. The cubic root of 134487021 is about 512.3421950001.

The spelling of 134487021 in words is "one hundred thirty-four million, four hundred eighty-seven thousand, twenty-one".