1286481 has 8 divisors (see below), whose sum is σ = 1960384. Its totient is φ = 735120.

The previous prime is 1286447. The next prime is 1286489. The reversal of 1286481 is 1846821.

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

It is not a de Polignac number, because 1286481 - 2⁹ = 1285969 is a prime.

It is a super-2 number, since 2×1286481² = 3310066726722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30610 + ... + 30651.

It is an arithmetic number, because the mean of its divisors is an integer number (245048).

2^1286481 is an apocalyptic number.

It is an amenable number.

1286481 is a deficient number, since it is larger than the sum of its proper divisors (673903).

1286481 is an equidigital number, since it uses as much as digits as its factorization.

1286481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61271.

The product of its digits is 3072, while the sum is 30.

The square root of 1286481 is about 1134.2314578603. The cubic root of 1286481 is about 108.7596477106.

The spelling of 1286481 in words is "one million, two hundred eighty-six thousand, four hundred eighty-one".