1005256465 has 8 divisors (see below), whose sum is σ = 1269797760. Its totient is φ = 761878512.

The previous prime is 1005256453. The next prime is 1005256471. The reversal of 1005256465 is 5646525001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005256465 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1005256465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5290729 + ... + 5290918.

It is an arithmetic number, because the mean of its divisors is an integer number (158724720).

Almost surely, 2^1005256465 is an apocalyptic number.

It is an amenable number.

1005256465 is a deficient number, since it is larger than the sum of its proper divisors (264541295).

1005256465 is a wasteful number, since it uses less digits than its factorization.

1005256465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10581671.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1005256465 is about 31705.7796781596. The cubic root of 1005256465 is about 1001.7490938869.

The spelling of 1005256465 in words is "one billion, five million, two hundred fifty-six thousand, four hundred sixty-five".