126501563 has 8 divisors (see below), whose sum is σ = 133263120. Its totient is φ = 119750400.

The previous prime is 126501533. The next prime is 126501569. The reversal of 126501563 is 365105621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126501563 - 2²⁶ = 59392699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126501569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43763 + ... + 46563.

It is an arithmetic number, because the mean of its divisors is an integer number (16657890).

Almost surely, 2^126501563 is an apocalyptic number.

126501563 is a deficient number, since it is larger than the sum of its proper divisors (6761557).

126501563 is a wasteful number, since it uses less digits than its factorization.

126501563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 126501563 is about 11247.2913628126. The cubic root of 126501563 is about 501.9941203948.

The spelling of 126501563 in words is "one hundred twenty-six million, five hundred one thousand, five hundred sixty-three".