126268251 has 4 divisors (see below), whose sum is σ = 168357672. Its totient is φ = 84178832.

The previous prime is 126268223. The next prime is 126268271. The reversal of 126268251 is 152862621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152862621 = 3 ⋅50954207.

It is a cyclic number.

It is not a de Polignac number, because 126268251 - 2⁶ = 126268187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126268271) 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, 21044706 + ... + 21044711.

It is an arithmetic number, because the mean of its divisors is an integer number (42089418).

Almost surely, 2^126268251 is an apocalyptic number.

126268251 is a deficient number, since it is larger than the sum of its proper divisors (42089421).

126268251 is an equidigital number, since it uses as much as digits as its factorization.

126268251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42089420.

The product of its digits is 11520, while the sum is 33.

The square root of 126268251 is about 11236.9146566128. The cubic root of 126268251 is about 501.6853143818.

The spelling of 126268251 in words is "one hundred twenty-six million, two hundred sixty-eight thousand, two hundred fifty-one".