126513321 has 8 divisors (see below), whose sum is σ = 184019424. Its totient is φ = 76674720.

The previous prime is 126513319. The next prime is 126513349. The reversal of 126513321 is 123315621.

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

It is not a de Polignac number, because 126513321 - 2¹ = 126513319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 126513291 and 126513300.

It is not an unprimeable number, because it can be changed into a prime (126513311) 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 7 ways as a sum of consecutive naturals, for example, 1916836 + ... + 1916901.

It is an arithmetic number, because the mean of its divisors is an integer number (23002428).

Almost surely, 2^126513321 is an apocalyptic number.

126513321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126513321 is a deficient number, since it is larger than the sum of its proper divisors (57506103).

126513321 is a wasteful number, since it uses less digits than its factorization.

126513321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833751.

The product of its digits is 1080, while the sum is 24.

The square root of 126513321 is about 11247.8140542952. The cubic root of 126513321 is about 502.0096729405.

Adding to 126513321 its reverse (123315621), we get a palindrome (249828942).

The spelling of 126513321 in words is "one hundred twenty-six million, five hundred thirteen thousand, three hundred twenty-one".