145242520 has 32 divisors (see below), whose sum is σ = 327564000. Its totient is φ = 57960448.

The previous prime is 145242511. The next prime is 145242551. The reversal of 145242520 is 25242541.

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 7 ways as a sum of consecutive naturals, for example, 13917 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (10236375).

Almost surely, 2^145242520 is an apocalyptic number.

145242520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145242520 is an abundant number, since it is smaller than the sum of its proper divisors (182321480).

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

145242520 is a wasteful number, since it uses less digits than its factorization.

145242520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547 (or 8543 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145242520 is about 12051.6604665083. The cubic root of 145242520 is about 525.6515206878.

The spelling of 145242520 in words is "one hundred forty-five million, two hundred forty-two thousand, five hundred twenty".