125010001 has 2 divisors, whose sum is σ = 125010002. Its totient is φ = 125010000.

The previous prime is 125009947. The next prime is 125010019. The reversal of 125010001 is 100010521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 25010001 = 10000^2 + 5001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125010001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125010001.

It is not a weakly prime, because it can be changed into another prime (125010071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62505000 + 62505001.

It is an arithmetic number, because the mean of its divisors is an integer number (62505001).

Almost surely, 2^125010001 is an apocalyptic number.

It is an amenable number.

125010001 is a deficient number, since it is larger than the sum of its proper divisors (1).

125010001 is an equidigital number, since it uses as much as digits as its factorization.

125010001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 125010001 is about 11180.7871368701. The cubic root of 125010001 is about 500.0133343111.

Adding to 125010001 its reverse (100010521), we get a palindrome (225020522).

The spelling of 125010001 in words is "one hundred twenty-five million, ten thousand, one".