20125001 has 8 divisors (see below), whose sum is σ = 22082760. Its totient is φ = 18225792.

The previous prime is 20124953. The next prime is 20125019. The reversal of 20125001 is 10052102.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 18696976 = 1195^2 + 4324^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-20125001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13916 + ... + 15293.

It is an arithmetic number, because the mean of its divisors is an integer number (2760345).

Almost surely, 2^20125001 is an apocalyptic number.

It is an amenable number.

20125001 is a deficient number, since it is larger than the sum of its proper divisors (1957759).

20125001 is a wasteful number, since it uses less digits than its factorization.

20125001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29275.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20125001 is about 4486.0897226872. The cubic root of 20125001 is about 272.0060957760.

Adding to 20125001 its reverse (10052102), we get a palindrome (30177103).

The spelling of 20125001 in words is "twenty million, one hundred twenty-five thousand, one".