1286461 has 8 divisors (see below), whose sum is σ = 1417824. Its totient is φ = 1157520.

The previous prime is 1286447. The next prime is 1286489. The reversal of 1286461 is 1646821.

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-1286461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (177228).

2^1286461 is an apocalyptic number.

1286461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1286461 is a deficient number, since it is larger than the sum of its proper divisors (131363).

1286461 is a wasteful number, since it uses less digits than its factorization.

1286461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its digits is 2304, while the sum is 28.

The square root of 1286461 is about 1134.2226412834. Note that the first 3 decimals coincide. The cubic root of 1286461 is about 108.7590841049.

The spelling of 1286461 in words is "one million, two hundred eighty-six thousand, four hundred sixty-one".