134021321 has 6 divisors (see below), whose sum is σ = 155902410. Its totient is φ = 114875376.

The previous prime is 134021317. The next prime is 134021347. The reversal of 134021321 is 123120431.

It can be written as a sum of positive squares in only one way, i.e., 106605625 + 27415696 = 10325^2 + 5236^2 .

It is not a de Polignac number, because 134021321 - 2² = 134021317 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 134021321.

It is not an unprimeable number, because it can be changed into a prime (134029321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1367516 + ... + 1367613.

It is an arithmetic number, because the mean of its divisors is an integer number (25983735).

Almost surely, 2^134021321 is an apocalyptic number.

It is an amenable number.

134021321 is a deficient number, since it is larger than the sum of its proper divisors (21881089).

134021321 is an equidigital number, since it uses as much as digits as its factorization.

134021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735143 (or 2735136 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 134021321 is about 11576.7577930956. The cubic root of 134021321 is about 511.7501336647.

Adding to 134021321 its reverse (123120431), we get a palindrome (257141752).

The spelling of 134021321 in words is "one hundred thirty-four million, twenty-one thousand, three hundred twenty-one".