145005720 has 64 divisors (see below), whose sum is σ = 457920000. Its totient is φ = 36632448.

The previous prime is 145005719. The next prime is 145005743. The reversal of 145005720 is 27500541.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 29520 + ... + 34079.

It is an arithmetic number, because the mean of its divisors is an integer number (7155000).

Almost surely, 2^145005720 is an apocalyptic number.

145005720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145005720 is an abundant number, since it is smaller than the sum of its proper divisors (312914280).

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

145005720 is a wasteful number, since it uses less digits than its factorization.

145005720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63632 (or 63628 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 145005720 is about 12041.8320865224. The cubic root of 145005720 is about 525.3656953246.

The spelling of 145005720 in words is "one hundred forty-five million, five thousand, seven hundred twenty".