125004440001 has 32 divisors (see below), whose sum is σ = 201717520128. Its totient is φ = 67219384320.

The previous prime is 125004439991. The next prime is 125004440009. The reversal of 125004440001 is 100044400521.

It is a happy number.

It is not a de Polignac number, because 125004440001 - 2²¹ = 125002342849 is a prime.

It is a super-2 number, since 2×125004440001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 125004440001.

It is not an unprimeable number, because it can be changed into a prime (125004440009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2853181 + ... + 2896661.

It is an arithmetic number, because the mean of its divisors is an integer number (6303672504).

Almost surely, 2^125004440001 is an apocalyptic number.

It is an amenable number.

125004440001 is a deficient number, since it is larger than the sum of its proper divisors (76713080127).

125004440001 is a wasteful number, since it uses less digits than its factorization.

125004440001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51561.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 125004440001 its reverse (100044400521), we get a palindrome (225048840522).

The spelling of 125004440001 in words is "one hundred twenty-five billion, four million, four hundred forty thousand, one".