187290145 has 8 divisors (see below), whose sum is σ = 256855104. Its totient is φ = 128427504.

The previous prime is 187290143. The next prime is 187290157. The reversal of 187290145 is 541092781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 187290145 - 2¹ = 187290143 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187290143) 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, 2675539 + ... + 2675608.

It is an arithmetic number, because the mean of its divisors is an integer number (32106888).

Almost surely, 2^187290145 is an apocalyptic number.

It is an amenable number.

187290145 is a deficient number, since it is larger than the sum of its proper divisors (69564959).

187290145 is an equidigital number, since it uses as much as digits as its factorization.

187290145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351159.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 187290145 is about 13685.3989711663. The cubic root of 187290145 is about 572.1435091124.

The spelling of 187290145 in words is "one hundred eighty-seven million, two hundred ninety thousand, one hundred forty-five".