134345021 has 4 divisors (see below), whose sum is σ = 134553312. Its totient is φ = 134136732.

The previous prime is 134345011. The next prime is 134345051. The reversal of 134345021 is 120543431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120543431 = 59 ⋅2043109.

It is a cyclic number.

It is not a de Polignac number, because 134345021 - 2²² = 130150717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134345011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103175 + ... + 104468.

It is an arithmetic number, because the mean of its divisors is an integer number (33638328).

Almost surely, 2^134345021 is an apocalyptic number.

It is an amenable number.

134345021 is a deficient number, since it is larger than the sum of its proper divisors (208291).

134345021 is an equidigital number, since it uses as much as digits as its factorization.

134345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208290.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 134345021 is about 11590.7299597566. The cubic root of 134345021 is about 512.1618102765.

Adding to 134345021 its reverse (120543431), we get a palindrome (254888452).

It can be divided in two parts, 1343 and 45021, that added together give a palindrome (46364).

The spelling of 134345021 in words is "one hundred thirty-four million, three hundred forty-five thousand, twenty-one".