134232721 has 4 divisors (see below), whose sum is σ = 153408832. Its totient is φ = 115056612.

The previous prime is 134232719. The next prime is 134232727. The reversal of 134232721 is 127232431.

It is a happy number.

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: 127232431 = 47 ⋅2707073.

It is a cyclic number.

It is not a de Polignac number, because 134232721 - 2¹ = 134232719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134232727) 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, 9588045 + ... + 9588058.

It is an arithmetic number, because the mean of its divisors is an integer number (38352208).

Almost surely, 2^134232721 is an apocalyptic number.

It is an amenable number.

134232721 is a deficient number, since it is larger than the sum of its proper divisors (19176111).

134232721 is an equidigital number, since it uses as much as digits as its factorization.

134232721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19176110.

The product of its digits is 2016, while the sum is 25.

The square root of 134232721 is about 11585.8845583753. The cubic root of 134232721 is about 512.0190638755.

The spelling of 134232721 in words is "one hundred thirty-four million, two hundred thirty-two thousand, seven hundred twenty-one".