126560001 has 4 divisors (see below), whose sum is σ = 168746672. Its totient is φ = 84373332.

The previous prime is 126559999. The next prime is 126560023. The reversal of 126560001 is 100065621.

It is a happy number.

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.

It is not a de Polignac number, because 126560001 - 2¹ = 126559999 is a prime.

It is a super-3 number, since 3×126560001³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126560001.

It is not an unprimeable number, because it can be changed into a prime (126560041) 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, 21093331 + ... + 21093336.

It is an arithmetic number, because the mean of its divisors is an integer number (42186668).

Almost surely, 2^126560001 is an apocalyptic number.

It is an amenable number.

126560001 is a deficient number, since it is larger than the sum of its proper divisors (42186671).

126560001 is an equidigital number, since it uses as much as digits as its factorization.

126560001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42186670.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 126560001 is about 11249.8889327851. Note that the first 3 decimals coincide. The cubic root of 126560001 is about 502.0714080205.

The spelling of 126560001 in words is "one hundred twenty-six million, five hundred sixty thousand, one".