134421520 has 20 divisors (see below), whose sum is σ = 312530220. Its totient is φ = 53768576.

The previous prime is 134421517. The next prime is 134421527. The reversal of 134421520 is 25124431.

It can be written as a sum of positive squares in 2 ways, for example, as 25928464 + 108493056 = 5092^2 + 10416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×134421520² = 36138290078220800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 134421491 and 134421500.

It is not an unprimeable number, because it can be changed into a prime (134421527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840055 + ... + 840214.

It is an arithmetic number, because the mean of its divisors is an integer number (15626511).

Almost surely, 2^134421520 is an apocalyptic number.

134421520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

134421520 is an abundant number, since it is smaller than the sum of its proper divisors (178108700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

134421520 is a wasteful number, since it uses less digits than its factorization.

134421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680282 (or 1680276 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 134421520 is about 11594.0294979787. The cubic root of 134421520 is about 512.2590038848.

Adding to 134421520 its reverse (25124431), we get a palindrome (159545951).

The spelling of 134421520 in words is "one hundred thirty-four million, four hundred twenty-one thousand, five hundred twenty".