145889459 has 4 divisors (see below), whose sum is σ = 150920160. Its totient is φ = 140858760.

The previous prime is 145889417. The next prime is 145889479. The reversal of 145889459 is 954988541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954988541 = 13 ⋅73460657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145889459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145889459.

It is not an unprimeable number, because it can be changed into a prime (145889479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2515307 + ... + 2515364.

It is an arithmetic number, because the mean of its divisors is an integer number (37730040).

Almost surely, 2^145889459 is an apocalyptic number.

145889459 is a deficient number, since it is larger than the sum of its proper divisors (5030701).

145889459 is an equidigital number, since it uses as much as digits as its factorization.

145889459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030700.

The product of its digits is 2073600, while the sum is 53.

The square root of 145889459 is about 12078.4708883203. The cubic root of 145889459 is about 526.4308168378.

The spelling of 145889459 in words is "one hundred forty-five million, eight hundred eighty-nine thousand, four hundred fifty-nine".