25100421 has 8 divisors (see below), whose sum is σ = 34546944. Its totient is φ = 16193760.

The previous prime is 25100401. The next prime is 25100423. The reversal of 25100421 is 12400152.

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

It is not a de Polignac number, because 25100421 - 2⁶ = 25100357 is a prime.

It is a super-2 number, since 2×25100421² = 1260062268754482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25100421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25100423) 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, 134856 + ... + 135041.

It is an arithmetic number, because the mean of its divisors is an integer number (4318368).

Almost surely, 2^25100421 is an apocalyptic number.

It is an amenable number.

25100421 is a deficient number, since it is larger than the sum of its proper divisors (9446523).

25100421 is a wasteful number, since it uses less digits than its factorization.

25100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269931.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25100421 is about 5010.0320358257. The cubic root of 25100421 is about 292.7927611568.

Adding to 25100421 its reverse (12400152), we get a palindrome (37500573).

The spelling of 25100421 in words is "twenty-five million, one hundred thousand, four hundred twenty-one".