1431666 has 12 divisors (see below), whose sum is σ = 3101982. Its totient is φ = 477216.

The previous prime is 1431659. The next prime is 1431713. The reversal of 1431666 is 6661341.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 594441 = 915^2 + 771^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 39751 + ... + 39786.

2^1431666 is an apocalyptic number.

1431666 is an abundant number, since it is smaller than the sum of its proper divisors (1670316).

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

1431666 is a wasteful number, since it uses less digits than its factorization.

1431666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79545 (or 79542 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1431666 is about 1196.5224611348. The cubic root of 1431666 is about 112.7060519999.

The spelling of 1431666 in words is "one million, four hundred thirty-one thousand, six hundred sixty-six".