25342403 has 4 divisors (see below), whose sum is σ = 25369320. Its totient is φ = 25315488.

The previous prime is 25342381. The next prime is 25342423. The reversal of 25342403 is 30424352.

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

It is a cyclic number.

It is not a de Polignac number, because 25342403 - 2¹⁸ = 25080259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25342423) 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, 11993 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (6342330).

Almost surely, 2^25342403 is an apocalyptic number.

25342403 is a deficient number, since it is larger than the sum of its proper divisors (26917).

25342403 is an equidigital number, since it uses as much as digits as its factorization.

25342403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26916.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 25342403 is about 5034.1238562435. The cubic root of 25342403 is about 293.7306486120.

Adding to 25342403 its reverse (30424352), we get a palindrome (55766755).

The spelling of 25342403 in words is "twenty-five million, three hundred forty-two thousand, four hundred three".