145545140 has 48 divisors (see below), whose sum is σ = 330538320. Its totient is φ = 53514240.

The previous prime is 145545139. The next prime is 145545151. The reversal of 145545140 is 41545541.

It can be written as a sum of positive squares in 8 ways, for example, as 45104656 + 100440484 = 6716^2 + 10022^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68900 + ... + 70980.

It is an arithmetic number, because the mean of its divisors is an integer number (6886215).

Almost surely, 2^145545140 is an apocalyptic number.

145545140 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 145545140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165269160).

145545140 is an abundant number, since it is smaller than the sum of its proper divisors (184993180).

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

145545140 is a wasteful number, since it uses less digits than its factorization.

145545140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372 (or 2370 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 145545140 is about 12064.2090499129. The cubic root of 145545140 is about 526.0163411097.

The spelling of 145545140 in words is "one hundred forty-five million, five hundred forty-five thousand, one hundred forty".