134121403 has 4 divisors (see below), whose sum is σ = 144438448. Its totient is φ = 123804360.

The previous prime is 134121389. The next prime is 134121451. The reversal of 134121403 is 304121431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304121431 = 73 ⋅4166047.

It is a cyclic number.

It is not a de Polignac number, because 134121403 - 2⁹ = 134120891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134121103) 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, 5158503 + ... + 5158528.

It is an arithmetic number, because the mean of its divisors is an integer number (36109612).

Almost surely, 2^134121403 is an apocalyptic number.

134121403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

134121403 is a deficient number, since it is larger than the sum of its proper divisors (10317045).

134121403 is a wasteful number, since it uses less digits than its factorization.

134121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317044.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 134121403 is about 11581.0795265381. The cubic root of 134121403 is about 511.8774871157.

Adding to 134121403 its reverse (304121431), we get a palindrome (438242834).

The spelling of 134121403 in words is "one hundred thirty-four million, one hundred twenty-one thousand, four hundred three".