134545381 has 4 divisors (see below), whose sum is σ = 134570700. Its totient is φ = 134520064.

The previous prime is 134545373. The next prime is 134545391. The reversal of 134545381 is 183545431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183545431 = 577 ⋅318103.

It can be written as a sum of positive squares in 2 ways, for example, as 35224225 + 99321156 = 5935^2 + 9966^2 .

It is a cyclic number.

It is not a de Polignac number, because 134545381 - 2³ = 134545373 is a prime.

It is a super-2 number, since 2×134545381² = 36204919096870322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134545391) 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, 1276 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (33642675).

Almost surely, 2^134545381 is an apocalyptic number.

It is an amenable number.

134545381 is a deficient number, since it is larger than the sum of its proper divisors (25319).

134545381 is an equidigital number, since it uses as much as digits as its factorization.

134545381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25318.

The product of its digits is 28800, while the sum is 34.

The square root of 134545381 is about 11599.3698535739. The cubic root of 134545381 is about 512.4162937651.

Subtracting 134545381 from its reverse (183545431), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 134545381 in words is "one hundred thirty-four million, five hundred forty-five thousand, three hundred eighty-one".