145561875 has 40 divisors (see below), whose sum is σ = 250982160. Its totient is φ = 74928000.

The previous prime is 145561861. The next prime is 145561877. The reversal of 145561875 is 578165541.

It is not a de Polignac number, because 145561875 - 2⁹ = 145561363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145561877) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53037 + ... + 55713.

It is an arithmetic number, because the mean of its divisors is an integer number (6274554).

Almost surely, 2^145561875 is an apocalyptic number.

145561875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145561875 is a deficient number, since it is larger than the sum of its proper divisors (105420285).

145561875 is an equidigital number, since it uses as much as digits as its factorization.

145561875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2714 counting only the distinct ones).

The product of its digits is 168000, while the sum is 42.

The square root of 145561875 is about 12064.9026104648. The cubic root of 145561875 is about 526.0365010548.

The spelling of 145561875 in words is "one hundred forty-five million, five hundred sixty-one thousand, eight hundred seventy-five".