145865225 has 24 divisors (see below), whose sum is σ = 198871200. Its totient is φ = 105248000.

The previous prime is 145865221. The next prime is 145865243. The reversal of 145865225 is 522568541.

It is not a de Polignac number, because 145865225 - 2² = 145865221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145865221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34001 + ... + 38049.

It is an arithmetic number, because the mean of its divisors is an integer number (8286300).

Almost surely, 2^145865225 is an apocalyptic number.

It is an amenable number.

145865225 is a deficient number, since it is larger than the sum of its proper divisors (53005975).

145865225 is a wasteful number, since it uses less digits than its factorization.

145865225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4196 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 145865225 is about 12077.4676567565. The cubic root of 145865225 is about 526.4016663862.

The spelling of 145865225 in words is "one hundred forty-five million, eight hundred sixty-five thousand, two hundred twenty-five".