126012013 has 4 divisors (see below), whose sum is σ = 126567360. Its totient is φ = 125456668.

The previous prime is 126011987. The next prime is 126012043. The reversal of 126012013 is 310210621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126012013 - 2²⁵ = 92457581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126012043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277333 + ... + 277786.

It is an arithmetic number, because the mean of its divisors is an integer number (31641840).

Almost surely, 2^126012013 is an apocalyptic number.

It is an amenable number.

126012013 is a deficient number, since it is larger than the sum of its proper divisors (555347).

126012013 is an equidigital number, since it uses as much as digits as its factorization.

126012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555346.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 126012013 is about 11225.5072491180. The cubic root of 126012013 is about 501.3457254632.

Adding to 126012013 its reverse (310210621), we get a palindrome (436222634).

The spelling of 126012013 in words is "one hundred twenty-six million, twelve thousand, thirteen".