145662481 has 4 divisors (see below), whose sum is σ = 145768000. Its totient is φ = 145556964.

The previous prime is 145662469. The next prime is 145662509. The reversal of 145662481 is 184266541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184266541 = 19 ⋅9698239.

It is a cyclic number.

It is not a de Polignac number, because 145662481 - 2⁹ = 145661969 is a prime.

It is a super-2 number, since 2×145662481² = 42435116742150722, which contains 22 as substring.

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 145662481.

It is not an unprimeable number, because it can be changed into a prime (145662421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50661 + ... + 53458.

It is an arithmetic number, because the mean of its divisors is an integer number (36442000).

Almost surely, 2^145662481 is an apocalyptic number.

It is an amenable number.

145662481 is a deficient number, since it is larger than the sum of its proper divisors (105519).

145662481 is a wasteful number, since it uses less digits than its factorization.

145662481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105518.

The product of its digits is 46080, while the sum is 37.

The square root of 145662481 is about 12069.0712567289. The cubic root of 145662481 is about 526.1576642838.

The spelling of 145662481 in words is "one hundred forty-five million, six hundred sixty-two thousand, four hundred eighty-one".