145513520 has 20 divisors (see below), whose sum is σ = 338319120. Its totient is φ = 58205376.

The previous prime is 145513517. The next prime is 145513553. The reversal of 145513520 is 25315541.

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

It is a self number, because there is not a number n which added to its sum of digits gives 145513520.

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 3 ways as a sum of consecutive naturals, for example, 909380 + ... + 909539.

It is an arithmetic number, because the mean of its divisors is an integer number (16915956).

Almost surely, 2^145513520 is an apocalyptic number.

145513520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145513520 is an abundant number, since it is smaller than the sum of its proper divisors (192805600).

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

145513520 is a wasteful number, since it uses less digits than its factorization.

145513520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818932 (or 1818926 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 145513520 is about 12062.8984908272. The cubic root of 145513520 is about 525.9782456173.

The spelling of 145513520 in words is "one hundred forty-five million, five hundred thirteen thousand, five hundred twenty".