145224020 has 24 divisors (see below), whose sum is σ = 305200224. Its totient is φ = 58045856.

The previous prime is 145223989. The next prime is 145224071. The reversal of 145224020 is 20422541.

It is a happy number.

145224020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 145223983 and 145224001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43739 + ... + 46941.

It is an arithmetic number, because the mean of its divisors is an integer number (12716676).

Almost surely, 2^145224020 is an apocalyptic number.

145224020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145224020 is an abundant number, since it is smaller than the sum of its proper divisors (159976204).

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

145224020 is a wasteful number, since it uses less digits than its factorization.

145224020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479 (or 5477 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 145224020 is about 12050.8929129754. The cubic root of 145224020 is about 525.6292017735.

Adding to 145224020 its reverse (20422541), we get a palindrome (165646561).

The spelling of 145224020 in words is "one hundred forty-five million, two hundred twenty-four thousand, twenty".