25521673 has 8 divisors (see below), whose sum is σ = 26085888. Its totient is φ = 24960624.

The previous prime is 25521667. The next prime is 25521677. The reversal of 25521673 is 37612552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25521673 - 2¹⁷ = 25390601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25521677) 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 7 ways as a sum of consecutive naturals, for example, 22936 + ... + 24022.

It is an arithmetic number, because the mean of its divisors is an integer number (3260736).

Almost surely, 2^25521673 is an apocalyptic number.

It is an amenable number.

25521673 is a deficient number, since it is larger than the sum of its proper divisors (564215).

25521673 is a wasteful number, since it uses less digits than its factorization.

25521673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583.

The product of its digits is 12600, while the sum is 31.

The square root of 25521673 is about 5051.8979601730. The cubic root of 25521673 is about 294.4216303777.

It can be divided in two parts, 2552 and 1673, that added together give a square (4225 = 65²).

The spelling of 25521673 in words is "twenty-five million, five hundred twenty-one thousand, six hundred seventy-three".