25505146 has 4 divisors (see below), whose sum is σ = 38257722. Its totient is φ = 12752572.

The previous prime is 25505111. The next prime is 25505159. The reversal of 25505146 is 64150552.

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

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 1347921 = 4915^2 + 1161^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6376285 + ... + 6376288.

Almost surely, 2^25505146 is an apocalyptic number.

25505146 is a deficient number, since it is larger than the sum of its proper divisors (12752576).

25505146 is a wasteful number, since it uses less digits than its factorization.

25505146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752575.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 25505146 is about 5050.2619734030. The cubic root of 25505146 is about 294.3580640512.

Adding to 25505146 its reverse (64150552), we get a palindrome (89655698).

It can be divided in two parts, 25505 and 146, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25505146 in words is "twenty-five million, five hundred five thousand, one hundred forty-six".