145581320 has 32 divisors (see below), whose sum is σ = 333115200. Its totient is φ = 57244608.

The previous prime is 145581307. The next prime is 145581343. The reversal of 145581320 is 23185541.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28484 + ... + 33203.

It is an arithmetic number, because the mean of its divisors is an integer number (10409850).

Almost surely, 2^145581320 is an apocalyptic number.

145581320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145581320 is an abundant number, since it is smaller than the sum of its proper divisors (187533880).

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

145581320 is a wasteful number, since it uses less digits than its factorization.

145581320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61757 (or 61753 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 145581320 is about 12065.7084334075. The cubic root of 145581320 is about 526.0599236814.

The spelling of 145581320 in words is "one hundred forty-five million, five hundred eighty-one thousand, three hundred twenty".