1613505 has 16 divisors (see below), whose sum is σ = 2597760. Its totient is φ = 855168.

The previous prime is 1613503. The next prime is 1613509. The reversal of 1613505 is 5053161.

It is a happy number.

It is not a de Polignac number, because 1613505 - 2¹ = 1613503 is a prime.

1613505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1613503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3741 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (162360).

2^1613505 is an apocalyptic number.

1613505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1613505 is a deficient number, since it is larger than the sum of its proper divisors (984255).

1613505 is a wasteful number, since it uses less digits than its factorization.

1613505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1613505 is about 1270.2381666444. The cubic root of 1613505 is about 117.2888618125.

Adding to 1613505 its reverse (5053161), we get a palindrome (6666666).

The spelling of 1613505 in words is "one million, six hundred thirteen thousand, five hundred five".