145510521 has 12 divisors (see below), whose sum is σ = 210086928. Its totient is φ = 89544624.

The previous prime is 145510513. The next prime is 145510553. The reversal of 145510521 is 125015541.

It is not a de Polignac number, because 145510521 - 2³ = 145510513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145510491 and 145510500.

It is not an unprimeable number, because it can be changed into a prime (145510921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142995 + ... + 144008.

It is an arithmetic number, because the mean of its divisors is an integer number (17507244).

Almost surely, 2^145510521 is an apocalyptic number.

It is an amenable number.

145510521 is a deficient number, since it is larger than the sum of its proper divisors (64576407).

145510521 is a wasteful number, since it uses less digits than its factorization.

145510521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287032 (or 287019 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 145510521 is about 12062.7741834124. The cubic root of 145510521 is about 525.9746321624.

The spelling of 145510521 in words is "one hundred forty-five million, five hundred ten thousand, five hundred twenty-one".