187172245 has 16 divisors (see below), whose sum is σ = 243250560. Its totient is φ = 137438784.

The previous prime is 187172243. The next prime is 187172299. The reversal of 187172245 is 542271781.

It is a cyclic number.

It is not a de Polignac number, because 187172245 - 2¹ = 187172243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187172243) 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, 3592 + ... + 19678.

It is an arithmetic number, because the mean of its divisors is an integer number (15203160).

Almost surely, 2^187172245 is an apocalyptic number.

It is an amenable number.

187172245 is a deficient number, since it is larger than the sum of its proper divisors (56078315).

187172245 is a wasteful number, since it uses less digits than its factorization.

187172245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284.

The product of its digits is 31360, while the sum is 37.

The square root of 187172245 is about 13681.0907825363. The cubic root of 187172245 is about 572.0234282627.

The spelling of 187172245 in words is "one hundred eighty-seven million, one hundred seventy-two thousand, two hundred forty-five".