126001213 has 4 divisors (see below), whose sum is σ = 135693628. Its totient is φ = 116308800.

The previous prime is 126001207. The next prime is 126001277. The reversal of 126001213 is 312100621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56145049 + 69856164 = 7493^2 + 8358^2 .

It is a cyclic number.

It is not a de Polignac number, because 126001213 - 2¹⁷ = 125870141 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 (126005213) 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, 4846188 + ... + 4846213.

It is an arithmetic number, because the mean of its divisors is an integer number (33923407).

Almost surely, 2^126001213 is an apocalyptic number.

126001213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

126001213 is a deficient number, since it is larger than the sum of its proper divisors (9692415).

126001213 is an equidigital number, since it uses as much as digits as its factorization.

126001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9692414.

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

The square root of 126001213 is about 11225.0261915062. The cubic root of 126001213 is about 501.3314022560.

Adding to 126001213 its reverse (312100621), we get a palindrome (438101834).

The spelling of 126001213 in words is "one hundred twenty-six million, one thousand, two hundred thirteen".