126223505 has 4 divisors (see below), whose sum is σ = 151468212. Its totient is φ = 100978800.

The previous prime is 126223463. The next prime is 126223507. The reversal of 126223505 is 505322621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505322621 = 229 ⋅2206649.

It can be written as a sum of positive squares in 2 ways, for example, as 36675136 + 89548369 = 6056^2 + 9463^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126223505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126223507) 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, 12622346 + ... + 12622355.

It is an arithmetic number, because the mean of its divisors is an integer number (37867053).

Almost surely, 2^126223505 is an apocalyptic number.

It is an amenable number.

126223505 is a deficient number, since it is larger than the sum of its proper divisors (25244707).

126223505 is an equidigital number, since it uses as much as digits as its factorization.

126223505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25244706.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 126223505 is about 11234.9234532328. The cubic root of 126223505 is about 501.6260462150.

The spelling of 126223505 in words is "one hundred twenty-six million, two hundred twenty-three thousand, five hundred five".