25016403 has 8 divisors (see below), whose sum is σ = 34256848. Its totient is φ = 16226784.

The previous prime is 25016399. The next prime is 25016423. The reversal of 25016403 is 30461052.

It is a happy number.

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

It is not a de Polignac number, because 25016403 - 2² = 25016399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25016403.

It is not an unprimeable number, because it can be changed into a prime (25016423) 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, 112576 + ... + 112797.

It is an arithmetic number, because the mean of its divisors is an integer number (4282106).

Almost surely, 2^25016403 is an apocalyptic number.

25016403 is a deficient number, since it is larger than the sum of its proper divisors (9240445).

25016403 is a wasteful number, since it uses less digits than its factorization.

25016403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225413.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 25016403 is about 5001.6400310298. The cubic root of 25016403 is about 292.4657100573.

Adding to 25016403 its reverse (30461052), we get a palindrome (55477455).

It can be divided in two parts, 250 and 16403, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 25016403 in words is "twenty-five million, sixteen thousand, four hundred three".