20125701 has 6 divisors (see below), whose sum is σ = 29070470. Its totient is φ = 13417128.

The previous prime is 20125697. The next prime is 20125723. The reversal of 20125701 is 10752102.

It can be written as a sum of positive squares in only one way, i.e., 19368801 + 756900 = 4401^2 + 870^2 .

It is not a de Polignac number, because 20125701 - 2² = 20125697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1118086 + ... + 1118103.

Almost surely, 2^20125701 is an apocalyptic number.

It is an amenable number.

20125701 is a deficient number, since it is larger than the sum of its proper divisors (8944769).

20125701 is a wasteful number, since it uses less digits than its factorization.

20125701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236195 (or 2236192 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20125701 is about 4486.1677409566. The cubic root of 20125701 is about 272.0092494332.

Adding to 20125701 its reverse (10752102), we get a palindrome (30877803).

The spelling of 20125701 in words is "twenty million, one hundred twenty-five thousand, seven hundred one".