25305073 has 4 divisors (see below), whose sum is σ = 25325028. Its totient is φ = 25285120.

The previous prime is 25305053. The next prime is 25305097. The reversal of 25305073 is 37050352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9168784 + 16136289 = 3028^2 + 4017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25305073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25305013) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7936 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (6331257).

Almost surely, 2^25305073 is an apocalyptic number.

It is an amenable number.

25305073 is a deficient number, since it is larger than the sum of its proper divisors (19955).

25305073 is a wasteful number, since it uses less digits than its factorization.

25305073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19954.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 25305073 is about 5030.4147940304. The cubic root of 25305073 is about 293.5863535161.

The spelling of 25305073 in words is "twenty-five million, three hundred five thousand, seventy-three".