172420324 has 24 divisors (see below), whose sum is σ = 320060160. Its totient is φ = 80992896.

The previous prime is 172420271. The next prime is 172420327. The reversal of 172420324 is 423024271.

It is a happy number.

172420324 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172420327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42037 + ... + 45955.

It is an arithmetic number, because the mean of its divisors is an integer number (13335840).

Almost surely, 2^172420324 is an apocalyptic number.

It is an amenable number.

172420324 is a deficient number, since it is larger than the sum of its proper divisors (147639836).

172420324 is a wasteful number, since it uses less digits than its factorization.

172420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587 (or 4585 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 172420324 is about 13130.8919727488. The cubic root of 172420324 is about 556.5824211058.

Adding to 172420324 its reverse (423024271), we get a palindrome (595444595).

The spelling of 172420324 in words is "one hundred seventy-two million, four hundred twenty thousand, three hundred twenty-four".