1165897215 has 48 divisors (see below), whose sum is σ = 2313013248. Its totient is φ = 532191168.

The previous prime is 1165897193. The next prime is 1165897231. The reversal of 1165897215 is 5127985611.

It is not a de Polignac number, because 1165897215 - 2¹¹ = 1165895167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245554 + ... + 250256.

It is an arithmetic number, because the mean of its divisors is an integer number (48187776).

Almost surely, 2^1165897215 is an apocalyptic number.

1165897215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165897215 is a deficient number, since it is larger than the sum of its proper divisors (1147116033).

1165897215 is a wasteful number, since it uses less digits than its factorization.

1165897215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508 (or 5505 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1165897215 is about 34145.2370763479. The cubic root of 1165897215 is about 1052.4951137866.

The spelling of 1165897215 in words is "one billion, one hundred sixty-five million, eight hundred ninety-seven thousand, two hundred fifteen".