145800481 has 4 divisors (see below), whose sum is σ = 145829764. Its totient is φ = 145771200.

The previous prime is 145800467. The next prime is 145800497. The reversal of 145800481 is 184008541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184008541 = 2803 ⋅65647.

It can be written as a sum of positive squares in 2 ways, for example, as 51710481 + 94090000 = 7191^2 + 9700^2 .

It is a cyclic number.

It is not a de Polignac number, because 145800481 - 2⁷ = 145800353 is a prime.

It is a super-2 number, since 2×145800481² = 42515560519662722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145800451) 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, 5100 + ... + 17821.

It is an arithmetic number, because the mean of its divisors is an integer number (36457441).

Almost surely, 2^145800481 is an apocalyptic number.

It is an amenable number.

145800481 is a deficient number, since it is larger than the sum of its proper divisors (29283).

145800481 is an equidigital number, since it uses as much as digits as its factorization.

145800481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29282.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 145800481 is about 12074.7869960509. The cubic root of 145800481 is about 526.3237716647.

The spelling of 145800481 in words is "one hundred forty-five million, eight hundred thousand, four hundred eighty-one".