126440063 has 4 divisors (see below), whose sum is σ = 129857400. Its totient is φ = 123022728.

The previous prime is 126439987. The next prime is 126440077. The reversal of 126440063 is 360044621.

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 126440063 - 2¹⁶ = 126374527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126440263) 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, 1708613 + ... + 1708686.

It is an arithmetic number, because the mean of its divisors is an integer number (32464350).

Almost surely, 2^126440063 is an apocalyptic number.

126440063 is a deficient number, since it is larger than the sum of its proper divisors (3417337).

126440063 is an equidigital number, since it uses as much as digits as its factorization.

126440063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417336.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 126440063 is about 11244.5570388522. The cubic root of 126440063 is about 501.9127573876.

Adding to 126440063 its reverse (360044621), we get a palindrome (486484684).

The spelling of 126440063 in words is "one hundred twenty-six million, four hundred forty thousand, sixty-three".