145457520 has 160 divisors (see below), whose sum is σ = 506967552. Its totient is φ = 34231296.

The previous prime is 145457513. The next prime is 145457539. The reversal of 145457520 is 25754541.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 70747 + ... + 72773.

Almost surely, 2^145457520 is an apocalyptic number.

145457520 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 145457520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253483776).

145457520 is an abundant number, since it is smaller than the sum of its proper divisors (361510032).

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

145457520 is a wasteful number, since it uses less digits than its factorization.

145457520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 145457520 is about 12060.5771006200. The cubic root of 145457520 is about 525.9107637754.

The spelling of 145457520 in words is "one hundred forty-five million, four hundred fifty-seven thousand, five hundred twenty".