25720003 has 4 divisors (see below), whose sum is σ = 26838288. Its totient is φ = 24601720.

The previous prime is 25720001. The next prime is 25720007. The reversal of 25720003 is 30002752.

It is a happy number.

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

It is not a de Polignac number, because 25720003 - 2¹ = 25720001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25720001) 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 3 ways as a sum of consecutive naturals, for example, 559108 + ... + 559153.

It is an arithmetic number, because the mean of its divisors is an integer number (6709572).

Almost surely, 2^25720003 is an apocalyptic number.

25720003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25720003 is a deficient number, since it is larger than the sum of its proper divisors (1118285).

25720003 is a wasteful number, since it uses less digits than its factorization.

25720003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118284.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 25720003 is about 5071.4892290135. The cubic root of 25720003 is about 295.1823176359.

Adding to 25720003 its reverse (30002752), we get a palindrome (55722755).

The spelling of 25720003 in words is "twenty-five million, seven hundred twenty thousand, three".