145894459 has 4 divisors (see below), whose sum is σ = 154476504. Its totient is φ = 137312416.

The previous prime is 145894423. The next prime is 145894471. The reversal of 145894459 is 954498541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145894459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145894159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290997 + ... + 4291030.

It is an arithmetic number, because the mean of its divisors is an integer number (38619126).

Almost surely, 2^145894459 is an apocalyptic number.

145894459 is a deficient number, since it is larger than the sum of its proper divisors (8582045).

145894459 is an equidigital number, since it uses as much as digits as its factorization.

145894459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582044.

The product of its digits is 1036800, while the sum is 49.

The square root of 145894459 is about 12078.6778663892. The cubic root of 145894459 is about 526.4368308067.

The spelling of 145894459 in words is "one hundred forty-five million, eight hundred ninety-four thousand, four hundred fifty-nine".