126426457 has 4 divisors (see below), whose sum is σ = 130786020. Its totient is φ = 122066896.

The previous prime is 126426449. The next prime is 126426473. The reversal of 126426457 is 754624621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754624621 = 47 ⋅16055843.

It can be written as a sum of positive squares in 2 ways, for example, as 36252441 + 90174016 = 6021^2 + 9496^2 .

It is a cyclic number.

It is not a de Polignac number, because 126426457 - 2³ = 126426449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126426427) 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, 2179738 + ... + 2179795.

It is an arithmetic number, because the mean of its divisors is an integer number (32696505).

Almost surely, 2^126426457 is an apocalyptic number.

It is an amenable number.

126426457 is a deficient number, since it is larger than the sum of its proper divisors (4359563).

126426457 is an equidigital number, since it uses as much as digits as its factorization.

126426457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359562.

The product of its digits is 80640, while the sum is 37.

The square root of 126426457 is about 11243.9520187521. The cubic root of 126426457 is about 501.8947534159.

The spelling of 126426457 in words is "one hundred twenty-six million, four hundred twenty-six thousand, four hundred fifty-seven".