145405259 has 4 divisors (see below), whose sum is σ = 146451480. Its totient is φ = 144359040.

The previous prime is 145405243. The next prime is 145405277. The reversal of 145405259 is 952504541.

It is a happy number.

145405259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952504541 = 241 ⋅3952301.

It is a cyclic number.

It is not a de Polignac number, because 145405259 - 2⁴ = 145405243 is a prime.

It is a super-2 number, since 2×145405259² = 42285378689714162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145405279) 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, 522902 + ... + 523179.

It is an arithmetic number, because the mean of its divisors is an integer number (36612870).

Almost surely, 2^145405259 is an apocalyptic number.

145405259 is a deficient number, since it is larger than the sum of its proper divisors (1046221).

145405259 is a wasteful number, since it uses less digits than its factorization.

145405259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046220.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 145405259 is about 12058.4103015281. The cubic root of 145405259 is about 525.8477719257.

The spelling of 145405259 in words is "one hundred forty-five million, four hundred five thousand, two hundred fifty-nine".