126213023 has 4 divisors (see below), whose sum is σ = 126470568. Its totient is φ = 125955480.

The previous prime is 126213013. The next prime is 126213097. The reversal of 126213023 is 320312621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 126213023 - 2¹⁸ = 125950879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126212986 and 126213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126213013) 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, 128036 + ... + 129017.

It is an arithmetic number, because the mean of its divisors is an integer number (31617642).

Almost surely, 2^126213023 is an apocalyptic number.

126213023 is a deficient number, since it is larger than the sum of its proper divisors (257545).

126213023 is an equidigital number, since it uses as much as digits as its factorization.

126213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257544.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 126213023 is about 11234.4569517178. The cubic root of 126213023 is about 501.6121602916.

Adding to 126213023 its reverse (320312621), we get a palindrome (446525644).

The spelling of 126213023 in words is "one hundred twenty-six million, two hundred thirteen thousand, twenty-three".