1072805256 has 64 divisors (see below), whose sum is σ = 3010795200. Its totient is φ = 353908224.

The previous prime is 1072805249. The next prime is 1072805257. The reversal of 1072805256 is 6525082701.

It is a happy number.

1072805256 is a `hidden beast` number, since 107 + 28 + 0 + 525 + 6 = 666.

It is a super-2 number, since 2×1072805256² = 2301822234602451072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1072805256.

It is not an unprimeable number, because it can be changed into a prime (1072805257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4650 + ... + 46553.

It is an arithmetic number, because the mean of its divisors is an integer number (47043675).

Almost surely, 2^1072805256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1072805256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505397600).

1072805256 is an abundant number, since it is smaller than the sum of its proper divisors (1937989944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1072805256 is a wasteful number, since it uses less digits than its factorization.

1072805256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51315 (or 51305 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1072805256 is about 32753.7059887885. The cubic root of 1072805256 is about 1023.7021864452.

Adding to 1072805256 its reverse (6525082701), we get a palindrome (7597887957).

The spelling of 1072805256 in words is "one billion, seventy-two million, eight hundred five thousand, two hundred fifty-six".