125500001 has 8 divisors (see below), whose sum is σ = 144962784. Its totient is φ = 107379520.

The previous prime is 125499989. The next prime is 125500061. The reversal of 125500001 is 100005521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125500001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125500061) 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 7 ways as a sum of consecutive naturals, for example, 335375 + ... + 335748.

It is an arithmetic number, because the mean of its divisors is an integer number (18120348).

Almost surely, 2^125500001 is an apocalyptic number.

125500001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125500001 is a deficient number, since it is larger than the sum of its proper divisors (19462783).

125500001 is a wasteful number, since it uses less digits than its factorization.

125500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671151.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 125500001 is about 11202.6782958362. The cubic root of 125500001 is about 500.6657810776.

Adding to 125500001 its reverse (100005521), we get a palindrome (225505522).

The spelling of 125500001 in words is "one hundred twenty-five million, five hundred thousand, one".