134020421 has 8 divisors (see below), whose sum is σ = 134889624. Its totient is φ = 133154560.

The previous prime is 134020417. The next prime is 134020429. The reversal of 134020421 is 124020431.

It can be written as a sum of positive squares in 4 ways, for example, as 1079521 + 132940900 = 1039^2 + 11530^2 .

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 134020421 - 2² = 134020417 is a prime.

It is a super-2 number, since 2×134020421² = 35922946490034482, which contains 22 as substring.

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 134020421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134020429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172991 + ... + 173763.

It is an arithmetic number, because the mean of its divisors is an integer number (16861203).

Almost surely, 2^134020421 is an apocalyptic number.

It is an amenable number.

134020421 is a deficient number, since it is larger than the sum of its proper divisors (869203).

134020421 is an equidigital number, since it uses as much as digits as its factorization.

134020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 134020421 is about 11576.7189220435. The cubic root of 134020421 is about 511.7489881352.

Adding to 134020421 its reverse (124020431), we get a palindrome (258040852).

The spelling of 134020421 in words is "one hundred thirty-four million, twenty thousand, four hundred twenty-one".