340632521 has 8 divisors (see below), whose sum is σ = 355614600. Its totient is φ = 325866240.

The previous prime is 340632493. The next prime is 340632529. The reversal of 340632521 is 125236043.

It can be written as a sum of positive squares in 4 ways, for example, as 63043600 + 277588921 = 7940^2 + 16661^2 .

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 340632521 - 2²² = 336438217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340632529) 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, 50720 + ... + 57041.

It is an arithmetic number, because the mean of its divisors is an integer number (44451825).

Almost surely, 2^340632521 is an apocalyptic number.

It is an amenable number.

340632521 is a deficient number, since it is larger than the sum of its proper divisors (14982079).

340632521 is a wasteful number, since it uses less digits than its factorization.

340632521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107899.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 340632521 is about 18456.2325787253. The cubic root of 340632521 is about 698.3857503554.

Adding to 340632521 its reverse (125236043), we get a palindrome (465868564).

The spelling of 340632521 in words is "three hundred forty million, six hundred thirty-two thousand, five hundred twenty-one".