145430905 has 16 divisors (see below), whose sum is σ = 179643024. Its totient is φ = 112942080.

The previous prime is 145430899. The next prime is 145430917. The reversal of 145430905 is 509034541.

145430905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1142761 + 144288144 = 1069^2 + 12012^2 .

It is not a de Polignac number, because 145430905 - 2³ = 145430897 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140269 + ... + 141301.

It is an arithmetic number, because the mean of its divisors is an integer number (11227689).

Almost surely, 2^145430905 is an apocalyptic number.

It is an amenable number.

145430905 is a deficient number, since it is larger than the sum of its proper divisors (34212119).

145430905 is a wasteful number, since it uses less digits than its factorization.

With its successor (145430906) it forms an eRAP, since the sums of their prime factors are consecutive (1836 and 1837).

145430905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 145430905 is about 12059.4736618146. The cubic root of 145430905 is about 525.8786857529.

The spelling of 145430905 in words is "one hundred forty-five million, four hundred thirty thousand, nine hundred five".