1616365 has 4 divisors (see below), whose sum is σ = 1939644. Its totient is φ = 1293088.

The previous prime is 1616359. The next prime is 1616401. The reversal of 1616365 is 5636161.

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 393129 + 1223236 = 627^2 + 1106^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616365 - 2⁹ = 1615853 is a prime.

It is a super-2 number, since 2×1616365² = 5225271626450, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161632 + ... + 161641.

It is an arithmetic number, because the mean of its divisors is an integer number (484911).

2^1616365 is an apocalyptic number.

It is an amenable number.

1616365 is a deficient number, since it is larger than the sum of its proper divisors (323279).

1616365 is an equidigital number, since it uses as much as digits as its factorization.

1616365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323278.

The product of its digits is 3240, while the sum is 28.

The square root of 1616365 is about 1271.3634413495. The cubic root of 1616365 is about 117.3581205882.

The spelling of 1616365 in words is "one million, six hundred sixteen thousand, three hundred sixty-five".