126406219 has 4 divisors (see below), whose sum is σ = 128791296. Its totient is φ = 124021144.

The previous prime is 126406151. The next prime is 126406249. The reversal of 126406219 is 912604621.

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 126406219 - 2¹⁵ = 126373451 is a prime.

It is a super-2 number, since 2×126406219² = 31957064403751922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126406249) 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, 1192459 + ... + 1192564.

It is an arithmetic number, because the mean of its divisors is an integer number (32197824).

Almost surely, 2^126406219 is an apocalyptic number.

126406219 is a deficient number, since it is larger than the sum of its proper divisors (2385077).

126406219 is an equidigital number, since it uses as much as digits as its factorization.

126406219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385076.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 126406219 is about 11243.0520322553. The cubic root of 126406219 is about 501.8679713422.

The spelling of 126406219 in words is "one hundred twenty-six million, four hundred six thousand, two hundred nineteen".