25210001 has 8 divisors (see below), whose sum is σ = 26866944. Its totient is φ = 23599840.

The previous prime is 25209991. The next prime is 25210007. The reversal of 25210001 is 10001252.

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

It is not a de Polignac number, because 25210001 - 2⁶ = 25209937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25210007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10580 + ... + 12741.

It is an arithmetic number, because the mean of its divisors is an integer number (3358368).

Almost surely, 2^25210001 is an apocalyptic number.

It is an amenable number.

25210001 is a deficient number, since it is larger than the sum of its proper divisors (1656943).

25210001 is a wasteful number, since it uses less digits than its factorization.

25210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23391.

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

The square root of 25210001 is about 5020.9561838359. The cubic root of 25210001 is about 293.2182208736.

Adding to 25210001 its reverse (10001252), we get a palindrome (35211253).

It can be divided in two parts, 252 and 10001, that multiplied together give a palindrome (2520252).

The spelling of 25210001 in words is "twenty-five million, two hundred ten thousand, one".