145586521 has 8 divisors (see below), whose sum is σ = 154827720. Its totient is φ = 136420608.

The previous prime is 145586501. The next prime is 145586557. The reversal of 145586521 is 125685541.

It can be written as a sum of positive squares in 4 ways, for example, as 58369600 + 87216921 = 7640^2 + 9339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145586521 - 2⁵ = 145586489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145586501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14806 + ... + 22591.

It is an arithmetic number, because the mean of its divisors is an integer number (19353465).

Almost surely, 2^145586521 is an apocalyptic number.

It is an amenable number.

145586521 is a deficient number, since it is larger than the sum of its proper divisors (9241199).

145586521 is a wasteful number, since it uses less digits than its factorization.

145586521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37643.

The product of its digits is 48000, while the sum is 37.

The square root of 145586521 is about 12065.9239596477. The cubic root of 145586521 is about 526.0661882330.

The spelling of 145586521 in words is "one hundred forty-five million, five hundred eighty-six thousand, five hundred twenty-one".