25101001 has 4 divisors (see below), whose sum is σ = 25231252. Its totient is φ = 24970752.

The previous prime is 25100963. The next prime is 25101007. The reversal of 25101001 is 10010152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9703225 + 15397776 = 3115^2 + 3924^2 .

It is a cyclic number.

It is not a de Polignac number, because 25101001 - 2⁹ = 25100489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25101007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64836 + ... + 65221.

It is an arithmetic number, because the mean of its divisors is an integer number (6307813).

Almost surely, 2^25101001 is an apocalyptic number.

It is an amenable number.

25101001 is a deficient number, since it is larger than the sum of its proper divisors (130251).

25101001 is a wasteful number, since it uses less digits than its factorization.

25101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130250.

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

The square root of 25101001 is about 5010.0899193527. The cubic root of 25101001 is about 292.7950163447.

Adding to 25101001 its reverse (10010152), we get a palindrome (35111153).

The spelling of 25101001 in words is "twenty-five million, one hundred one thousand, one".