1281662 has 8 divisors (see below), whose sum is σ = 1927800. Its totient is φ = 639064.

The previous prime is 1281653. The next prime is 1281667. The reversal of 1281662 is 2661821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389 + ... + 1647.

It is an arithmetic number, because the mean of its divisors is an integer number (240975).

2^1281662 is an apocalyptic number.

1281662 is a deficient number, since it is larger than the sum of its proper divisors (646138).

1281662 is a wasteful number, since it uses less digits than its factorization.

1281662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its digits is 1152, while the sum is 26.

The square root of 1281662 is about 1132.1051187942. The cubic root of 1281662 is about 108.6236776941.

The spelling of 1281662 in words is "one million, two hundred eighty-one thousand, six hundred sixty-two".