145004420 has 48 divisors (see below), whose sum is σ = 346647168. Its totient is φ = 50434560.

The previous prime is 145004401. The next prime is 145004423. The reversal of 145004420 is 24400541.

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 = 145004392 and 145004401.

It is not an unprimeable number, because it can be changed into a prime (145004423) by changing a digit.

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, 9269 + ... + 19388.

It is an arithmetic number, because the mean of its divisors is an integer number (7221816).

Almost surely, 2^145004420 is an apocalyptic number.

145004420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145004420 is an abundant number, since it is smaller than the sum of its proper divisors (201642748).

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

145004420 is a wasteful number, since it uses less digits than its factorization.

145004420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28700 (or 28698 counting only the distinct ones).

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

The square root of 145004420 is about 12041.7781079042. The cubic root of 145004420 is about 525.3641253234.

Adding to 145004420 its reverse (24400541), we get a palindrome (169404961).

The spelling of 145004420 in words is "one hundred forty-five million, four thousand, four hundred twenty".