145172424 has 32 divisors (see below), whose sum is σ = 364464000. Its totient is φ = 48186432.

The previous prime is 145172393. The next prime is 145172453. The reversal of 145172424 is 424271541.

It is a junction number, because it is equal to n+sod(n) for n = 145172391 and 145172400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6919 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (11389500).

Almost surely, 2^145172424 is an apocalyptic number.

It is an amenable number.

145172424 is an abundant number, since it is smaller than the sum of its proper divisors (219291576).

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

145172424 is a wasteful number, since it uses less digits than its factorization.

145172424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25557 (or 25553 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 145172424 is about 12048.7519685650. The cubic root of 145172424 is about 525.5669449082.

The spelling of 145172424 in words is "one hundred forty-five million, one hundred seventy-two thousand, four hundred twenty-four".