25550425 has 6 divisors (see below), whose sum is σ = 31682558. Its totient is φ = 20440320.

The previous prime is 25550419. The next prime is 25550431. The reversal of 25550425 is 52405552.

It is an interprime number because it is at equal distance from previous prime (25550419) and next prime (25550431).

It can be written as a sum of positive squares in 3 ways, for example, as 68121 + 25482304 = 261^2 + 5048^2 .

It is not a de Polignac number, because 25550425 - 2⁹ = 25549913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25550393 and 25550402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510984 + ... + 511033.

Almost surely, 2^25550425 is an apocalyptic number.

25550425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25550425 is a deficient number, since it is larger than the sum of its proper divisors (6132133).

25550425 is a wasteful number, since it uses less digits than its factorization.

25550425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022027 (or 1022022 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 25550425 is about 5054.7428223402. The cubic root of 25550425 is about 294.5321512648.

Adding to 25550425 its reverse (52405552), we get a palindrome (77955977).

The spelling of 25550425 in words is "twenty-five million, five hundred fifty thousand, four hundred twenty-five".