1285481 has 2 divisors, whose sum is σ = 1285482. Its totient is φ = 1285480.

The previous prime is 1285469. The next prime is 1285507. The reversal of 1285481 is 1845821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 547600 = 859^2 + 740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285481 is a prime.

It is a super-2 number, since 2×1285481² = 3304922802722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1285411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642740 + 642741.

It is an arithmetic number, because the mean of its divisors is an integer number (642741).

2^1285481 is an apocalyptic number.

It is an amenable number.

1285481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285481 is an equidigital number, since it uses as much as digits as its factorization.

1285481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 29.

The square root of 1285481 is about 1133.7905450303. The cubic root of 1285481 is about 108.7314602649.

The spelling of 1285481 in words is "one million, two hundred eighty-five thousand, four hundred eighty-one".