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10200001 = 71457143

10200001 has 4 divisors (see below), whose sum is σ = 11657152. Its totient is φ = 8742852.

The previous prime is 10199999. The next prime is 10200007. The reversal of 10200001 is 10000201.

10200001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10000201 = 22943669.

It is a cyclic number.

It is not a de Polignac number, because 10200001 - 21 = 10199999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10200007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728565 + ... + 728578.

It is an arithmetic number, because the mean of its divisors is an integer number (2914288).

Almost surely, 210200001 is an apocalyptic number.

It is an amenable number.

10200001 is a deficient number, since it is larger than the sum of its proper divisors (1457151).

10200001 is an equidigital number, since it uses as much as digits as its factorization.

10200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457150.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 10200001 is about 3193.7440410903. The cubic root of 10200001 is about 216.8702956123.

Adding to 10200001 its reverse (10000201), we get a palindrome (20200202).

Multiplying 10200001 by its reverse (10000201), we get a palindrome (102002060200201).

The spelling of 10200001 in words is "ten million, two hundred thousand, one".

Divisors: 1 7 1457143 10200001