126315121 has 3 divisors (see below), whose sum is σ = 126326361. Its totient is φ = 126303882.

The previous prime is 126315113. The next prime is 126315131. The reversal of 126315121 is 121513621.

It is a happy number.

The square root of 126315121 is 11239.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 126315121 - 2³ = 126315113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126315092 and 126315101.

It is not an unprimeable number, because it can be changed into a prime (126315131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5620 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (42108787).

Almost surely, 2^126315121 is an apocalyptic number.

126315121 is the 11239-th square number.

126315121 is the 5620-th centered octagonal number.

It is an amenable number.

126315121 is a deficient number, since it is larger than the sum of its proper divisors (11240).

126315121 is an frugal number, since it uses more digits than its factorization.

126315121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22478 (or 11239 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The cubic root of 126315121 is about 501.7473808730.

Adding to 126315121 its reverse (121513621), we get a palindrome (247828742).

It can be divided in two parts, 1263 and 15121, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 126315121 in words is "one hundred twenty-six million, three hundred fifteen thousand, one hundred twenty-one".