189942225 has 24 divisors (see below), whose sum is σ = 342588192. Its totient is φ = 92092800.

The previous prime is 189942209. The next prime is 189942229. The reversal of 189942225 is 522249981.

It is a happy number.

It is not a de Polignac number, because 189942225 - 2⁴ = 189942209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189942229) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 114292 + ... + 115941.

It is an arithmetic number, because the mean of its divisors is an integer number (14274508).

Almost surely, 2^189942225 is an apocalyptic number.

189942225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189942225 is a deficient number, since it is larger than the sum of its proper divisors (152645967).

189942225 is a wasteful number, since it uses less digits than its factorization.

189942225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230257 (or 230252 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 189942225 is about 13781.9528732324. The cubic root of 189942225 is about 574.8314313681.

The spelling of 189942225 in words is "one hundred eighty-nine million, nine hundred forty-two thousand, two hundred twenty-five".