145542320 has 80 divisors (see below), whose sum is σ = 421901568. Its totient is φ = 45361920.

The previous prime is 145542317. The next prime is 145542347. The reversal of 145542320 is 23245541.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 145542320.

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, 5654 + ... + 17973.

Almost surely, 2^145542320 is an apocalyptic number.

145542320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145542320 is an abundant number, since it is smaller than the sum of its proper divisors (276359248).

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

145542320 is a wasteful number, since it uses less digits than its factorization.

145542320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23658 (or 23652 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 145542320 is about 12064.0921747142. The cubic root of 145542320 is about 526.0129438231.

Adding to 145542320 its reverse (23245541), we get a palindrome (168787861).

The spelling of 145542320 in words is "one hundred forty-five million, five hundred forty-two thousand, three hundred twenty".