1286498256 has 160 divisors (see below), whose sum is σ = 3627410688. Its totient is φ = 391372800.

The previous prime is 1286498249. The next prime is 1286498267. The reversal of 1286498256 is 6528946821.

It is a happy number.

1286498256 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 1286498199 and 1286498208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6530350 + ... + 6530546.

Almost surely, 2^1286498256 is an apocalyptic number.

1286498256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286498256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813705344).

1286498256 is an abundant number, since it is smaller than the sum of its proper divisors (2340912432).

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

1286498256 is a wasteful number, since it uses less digits than its factorization.

1286498256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 423 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 1286498256 is about 35867.7885574229. The cubic root of 1286498256 is about 1087.6013398494.

The spelling of 1286498256 in words is "one billion, two hundred eighty-six million, four hundred ninety-eight thousand, two hundred fifty-six".