125340321 has 16 divisors (see below), whose sum is σ = 180210240. Its totient is φ = 77230080.

The previous prime is 125340287. The next prime is 125340323. The reversal of 125340321 is 123043521.

125340321 = 389² + 390² + ... + 757².

It is not a de Polignac number, because 125340321 - 2¹⁹ = 124816033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125340323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24480 + ... + 29153.

It is an arithmetic number, because the mean of its divisors is an integer number (11263140).

Almost surely, 2^125340321 is an apocalyptic number.

It is an amenable number.

125340321 is a deficient number, since it is larger than the sum of its proper divisors (54869919).

125340321 is a wasteful number, since it uses less digits than its factorization.

125340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53696.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 125340321 is about 11195.5491602690. The cubic root of 125340321 is about 500.4533501564.

Adding to 125340321 its reverse (123043521), we get a palindrome (248383842).

The spelling of 125340321 in words is "one hundred twenty-five million, three hundred forty thousand, three hundred twenty-one".