134242421 has 16 divisors (see below), whose sum is σ = 153446400. Its totient is φ = 116675328.

The previous prime is 134242417. The next prime is 134242453. The reversal of 134242421 is 124242431.

It is a cyclic number.

It is not a de Polignac number, because 134242421 - 2² = 134242417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134242021) 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, 5420 + ... + 17258.

It is an arithmetic number, because the mean of its divisors is an integer number (9590400).

Almost surely, 2^134242421 is an apocalyptic number.

It is an amenable number.

134242421 is a deficient number, since it is larger than the sum of its proper divisors (19203979).

134242421 is a wasteful number, since it uses less digits than its factorization.

134242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11908.

The product of its digits is 1536, while the sum is 23.

The square root of 134242421 is about 11586.3031636497. The cubic root of 134242421 is about 512.0313968478.

Adding to 134242421 its reverse (124242431), we get a palindrome (258484852).

The spelling of 134242421 in words is "one hundred thirty-four million, two hundred forty-two thousand, four hundred twenty-one".