126321013 has 32 divisors (see below), whose sum is σ = 162408960. Its totient is φ = 95558400.

The previous prime is 126321011. The next prime is 126321017. The reversal of 126321013 is 310123621.

It is not a de Polignac number, because 126321013 - 2¹ = 126321011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126321011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398331 + ... + 398647.

It is an arithmetic number, because the mean of its divisors is an integer number (5075280).

Almost surely, 2^126321013 is an apocalyptic number.

126321013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

126321013 is a deficient number, since it is larger than the sum of its proper divisors (36087947).

126321013 is a wasteful number, since it uses less digits than its factorization.

126321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 126321013 is about 11239.2621199081. The cubic root of 126321013 is about 501.7551821286.

Adding to 126321013 its reverse (310123621), we get a palindrome (436444634).

The spelling of 126321013 in words is "one hundred twenty-six million, three hundred twenty-one thousand, thirteen".