1613725 has 12 divisors (see below), whose sum is σ = 2119284. Its totient is φ = 1214720.

The previous prime is 1613713. The next prime is 1613741. The reversal of 1613725 is 5273161.

It can be written as a sum of positive squares in 6 ways, for example, as 168921 + 1444804 = 411^2 + 1202^2 .

It is not a de Polignac number, because 1613725 - 2⁷ = 1613597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1613725.

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 11 ways as a sum of consecutive naturals, for example, 1474 + ... + 2323.

It is an arithmetic number, because the mean of its divisors is an integer number (176607).

2^1613725 is an apocalyptic number.

It is an amenable number.

1613725 is a deficient number, since it is larger than the sum of its proper divisors (505559).

1613725 is a wasteful number, since it uses less digits than its factorization.

1613725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824 (or 3819 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 1613725 is about 1270.3247616259. The cubic root of 1613725 is about 117.2941923149.

Adding to 1613725 its reverse (5273161), we get a palindrome (6886886).

The spelling of 1613725 in words is "one million, six hundred thirteen thousand, seven hundred twenty-five".