19085725 has 6 divisors (see below), whose sum is σ = 23666330. Its totient is φ = 15268560.

The previous prime is 19085719. The next prime is 19085743. The reversal of 19085725 is 52758091.

It can be written as a sum of positive squares in 3 ways, for example, as 1954404 + 17131321 = 1398^2 + 4139^2 .

It is not a de Polignac number, because 19085725 - 2⁷ = 19085597 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

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 in 5 ways as a sum of consecutive naturals, for example, 381690 + ... + 381739.

Almost surely, 2^19085725 is an apocalyptic number.

It is an amenable number.

19085725 is a deficient number, since it is larger than the sum of its proper divisors (4580605).

19085725 is an equidigital number, since it uses as much as digits as its factorization.

19085725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763439 (or 763434 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 19085725 is about 4368.7212087749. The cubic root of 19085725 is about 267.2408763898.

The spelling of 19085725 in words is "nineteen million, eighty-five thousand, seven hundred twenty-five".