126222257 has 4 divisors (see below), whose sum is σ = 144254016. Its totient is φ = 108190500.

The previous prime is 126222253. The next prime is 126222287. The reversal of 126222257 is 752222621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752222621 = 25639 ⋅29339.

It is a cyclic number.

It is not a de Polignac number, because 126222257 - 2² = 126222253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126222253) 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, 9015869 + ... + 9015882.

It is an arithmetic number, because the mean of its divisors is an integer number (36063504).

Almost surely, 2^126222257 is an apocalyptic number.

It is an amenable number.

126222257 is a deficient number, since it is larger than the sum of its proper divisors (18031759).

126222257 is an equidigital number, since it uses as much as digits as its factorization.

126222257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18031758.

The product of its digits is 6720, while the sum is 29.

The square root of 126222257 is about 11234.8679119961. The cubic root of 126222257 is about 501.6243929799.

Adding to 126222257 its reverse (752222621), we get a palindrome (878444878).

The spelling of 126222257 in words is "one hundred twenty-six million, two hundred twenty-two thousand, two hundred fifty-seven".