25278003 has 6 divisors (see below), whose sum is σ = 36512684. Its totient is φ = 16851996.

The previous prime is 25277971. The next prime is 25278049. The reversal of 25278003 is 30087252.

It is not a de Polignac number, because 25278003 - 2⁵ = 25277971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25278703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1404325 + ... + 1404342.

Almost surely, 2^25278003 is an apocalyptic number.

25278003 is a deficient number, since it is larger than the sum of its proper divisors (11234681).

25278003 is a wasteful number, since it uses less digits than its factorization.

25278003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808673 (or 2808670 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25278003 is about 5027.7234410815. The cubic root of 25278003 is about 293.4816285575.

Subtracting 25278003 from its reverse (30087252), we obtain a square (4809249 = 2193²).

The spelling of 25278003 in words is "twenty-five million, two hundred seventy-eight thousand, three".