134445420 has 120 divisors (see below), whose sum is σ = 433352304. Its totient is φ = 34867584.

The previous prime is 134445413. The next prime is 134445433. The reversal of 134445420 is 24544431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 58819 + ... + 61061.

Almost surely, 2^134445420 is an apocalyptic number.

134445420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134445420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216676152).

134445420 is an abundant number, since it is smaller than the sum of its proper divisors (298906884).

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

134445420 is a wasteful number, since it uses less digits than its factorization.

134445420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 134445420 is about 11595.0601550833. The cubic root of 134445420 is about 512.2893617835.

Adding to 134445420 its reverse (24544431), we get a palindrome (158989851).

It can be divided in two parts, 1344 and 45420, that added together give a palindrome (46764).

The spelling of 134445420 in words is "one hundred thirty-four million, four hundred forty-five thousand, four hundred twenty".