25021630 has 8 divisors (see below), whose sum is σ = 45038952. Its totient is φ = 10008648.

The previous prime is 25021609. The next prime is 25021643. The reversal of 25021630 is 3612052.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 25021598 and 25021607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251072 + ... + 1251091.

It is an arithmetic number, because the mean of its divisors is an integer number (5629869).

Almost surely, 2^25021630 is an apocalyptic number.

25021630 is a deficient number, since it is larger than the sum of its proper divisors (20017322).

25021630 is a wasteful number, since it uses less digits than its factorization.

25021630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502170.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 25021630 is about 5002.1625323454. The cubic root of 25021630 is about 292.4860781842.

Adding to 25021630 its reverse (3612052), we get a palindrome (28633682).

It can be divided in two parts, 25021 and 630, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25021630 in words is "twenty-five million, twenty-one thousand, six hundred thirty".