7816465 has 4 divisors (see below), whose sum is σ = 9379764. Its totient is φ = 6253168.

The previous prime is 7816463. The next prime is 7816477. The reversal of 7816465 is 5646187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5646187 = 569 ⋅9923.

It can be written as a sum of positive squares in 2 ways, for example, as 5253264 + 2563201 = 2292^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 7816465 - 2¹ = 7816463 is a prime.

It is a super-2 number, since 2×7816465² = 122194250192450, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

7816465 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7816463) 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, 781642 + ... + 781651.

It is an arithmetic number, because the mean of its divisors is an integer number (2344941).

Almost surely, 2^7816465 is an apocalyptic number.

It is an amenable number.

7816465 is a deficient number, since it is larger than the sum of its proper divisors (1563299).

7816465 is a wasteful number, since it uses less digits than its factorization.

7816465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563298.

The product of its digits is 40320, while the sum is 37.

The square root of 7816465 is about 2795.7941626665. The cubic root of 7816465 is about 198.4586940597.

It can be divided in two parts, 7816 and 465, that added together give a square (8281 = 91²).

The spelling of 7816465 in words is "seven million, eight hundred sixteen thousand, four hundred sixty-five".