1605210465 has 64 divisors (see below), whose sum is σ = 2836373760. Its totient is φ = 771563520.

The previous prime is 1605210443. The next prime is 1605210487. The reversal of 1605210465 is 5640125061.

It is an interprime number because it is at equal distance from previous prime (1605210443) and next prime (1605210487).

It is not a de Polignac number, because 1605210465 - 2⁵ = 1605210433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 967917 + ... + 969573.

It is an arithmetic number, because the mean of its divisors is an integer number (44318340).

Almost surely, 2^1605210465 is an apocalyptic number.

1605210465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1605210465 is a deficient number, since it is larger than the sum of its proper divisors (1231163295).

1605210465 is a wasteful number, since it uses less digits than its factorization.

1605210465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1605210465 is about 40065.0778733800. The cubic root of 1605210465 is about 1170.8753439191.

The spelling of 1605210465 in words is "one billion, six hundred five million, two hundred ten thousand, four hundred sixty-five".