1613501 has 4 divisors (see below), whose sum is σ = 1616604. Its totient is φ = 1610400.

The previous prime is 1613497. The next prime is 1613503. The reversal of 1613501 is 1053161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1053161 = 439 ⋅2399.

It can be written as a sum of positive squares in 2 ways, for example, as 682276 + 931225 = 826^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613501 - 2² = 1613497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1613501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613503) 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, 560 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (404151).

2^1613501 is an apocalyptic number.

It is an amenable number.

1613501 is a deficient number, since it is larger than the sum of its proper divisors (3103).

1613501 is an equidigital number, since it uses as much as digits as its factorization.

1613501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1613501 is about 1270.2365921355. The cubic root of 1613501 is about 117.2887648898.

Adding to 1613501 its reverse (1053161), we get a palindrome (2666662).

The spelling of 1613501 in words is "one million, six hundred thirteen thousand, five hundred one".