145278625 has 8 divisors (see below), whose sum is σ = 181307880. Its totient is φ = 116222800.

The previous prime is 145278599. The next prime is 145278641. The reversal of 145278625 is 526872541.

It can be written as a sum of positive squares in 4 ways, for example, as 4524129 + 140754496 = 2127^2 + 11864^2 .

It is not a de Polignac number, because 145278625 - 2⁵ = 145278593 is a prime.

It is a super-2 number, since 2×145278625² = 42211757763781250, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 580990 + ... + 581239.

It is an arithmetic number, because the mean of its divisors is an integer number (22663485).

Almost surely, 2^145278625 is an apocalyptic number.

It is an amenable number.

145278625 is a deficient number, since it is larger than the sum of its proper divisors (36029255).

145278625 is an equidigital number, since it uses as much as digits as its factorization.

145278625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162244 (or 1162234 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 145278625 is about 12053.1582997984. The cubic root of 145278625 is about 525.6950733053.

The spelling of 145278625 in words is "one hundred forty-five million, two hundred seventy-eight thousand, six hundred twenty-five".