25021641 has 8 divisors (see below), whose sum is σ = 33567520. Its totient is φ = 16578432.

The previous prime is 25021609. The next prime is 25021643. The reversal of 25021641 is 14612052.

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

It is not a de Polignac number, because 25021641 - 2⁵ = 25021609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25021643) 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, 25096 + ... + 26073.

It is an arithmetic number, because the mean of its divisors is an integer number (4195940).

Almost surely, 2^25021641 is an apocalyptic number.

It is an amenable number.

25021641 is a deficient number, since it is larger than the sum of its proper divisors (8545879).

25021641 is a wasteful number, since it uses less digits than its factorization.

25021641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51335.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 25021641 is about 5002.1636318697. The cubic root of 25021641 is about 292.4861210450.

Adding to 25021641 its reverse (14612052), we get a palindrome (39633693).

The spelling of 25021641 in words is "twenty-five million, twenty-one thousand, six hundred forty-one".