145868187 has 18 divisors (see below), whose sum is σ = 205826868. Its totient is φ = 91876248.

The previous prime is 145868183. The next prime is 145868221. The reversal of 145868187 is 781868541.

It is a happy number.

145868187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145868187 - 2² = 145868183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145868183) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 397278 + ... + 397644.

It is an arithmetic number, because the mean of its divisors is an integer number (11434826).

Almost surely, 2^145868187 is an apocalyptic number.

145868187 is a deficient number, since it is larger than the sum of its proper divisors (59958681).

145868187 is an frugal number, since it uses more digits than its factorization.

145868187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 389 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 145868187 is about 12077.5902811778. The cubic root of 145868187 is about 526.4052294725.

Multiplying 145868187 by its sum of digits (48), we get a square (7001672976 = 83676²).

The spelling of 145868187 in words is "one hundred forty-five million, eight hundred sixty-eight thousand, one hundred eighty-seven".