1613257 has 4 divisors (see below), whose sum is σ = 1617300. Its totient is φ = 1609216.

The previous prime is 1613201. The next prime is 1613279. The reversal of 1613257 is 7523161.

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 746496 + 866761 = 864^2 + 931^2 .

It is not a de Polignac number, because 1613257 - 2¹⁵ = 1580489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613057) 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 3 ways as a sum of consecutive naturals, for example, 1348 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (404325).

2^1613257 is an apocalyptic number.

It is an amenable number.

1613257 is a deficient number, since it is larger than the sum of its proper divisors (4043).

1613257 is an equidigital number, since it uses as much as digits as its factorization.

1613257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042.

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

The square root of 1613257 is about 1270.1405434045. The cubic root of 1613257 is about 117.2828523015.

The spelling of 1613257 in words is "one million, six hundred thirteen thousand, two hundred fifty-seven".