145605457 has 4 divisors (see below), whose sum is σ = 145630516. Its totient is φ = 145580400.

The previous prime is 145605443. The next prime is 145605487. The reversal of 145605457 is 754506541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754506541 = 107 ⋅7051463.

It can be written as a sum of positive squares in 2 ways, for example, as 93779856 + 51825601 = 9684^2 + 7199^2 .

It is a cyclic number.

It is not a de Polignac number, because 145605457 - 2⁷ = 145605329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145605407) 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, 1207 + ... + 17107.

It is an arithmetic number, because the mean of its divisors is an integer number (36407629).

Almost surely, 2^145605457 is an apocalyptic number.

It is an amenable number.

145605457 is a deficient number, since it is larger than the sum of its proper divisors (25059).

145605457 is an equidigital number, since it uses as much as digits as its factorization.

145605457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25058.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 145605457 is about 12066.7086233156. The cubic root of 145605457 is about 526.0889951921.

The spelling of 145605457 in words is "one hundred forty-five million, six hundred five thousand, four hundred fifty-seven".