1281429 has 6 divisors (see below), whose sum is σ = 1850966. Its totient is φ = 854280.

The previous prime is 1281407. The next prime is 1281431. The reversal of 1281429 is 9241821.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 178929 = 1050^2 + 423^2 .

It is not a de Polignac number, because 1281429 - 2²⁰ = 232853 is a prime.

It is a Duffinian number.

1281429 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281439) 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 5 ways as a sum of consecutive naturals, for example, 71182 + ... + 71199.

2^1281429 is an apocalyptic number.

It is an amenable number.

1281429 is a deficient number, since it is larger than the sum of its proper divisors (569537).

1281429 is a wasteful number, since it uses less digits than its factorization.

1281429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142387 (or 142384 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1281429 is about 1132.0022084784. The cubic root of 1281429 is about 108.6170948741.

The spelling of 1281429 in words is "one million, two hundred eighty-one thousand, four hundred twenty-nine".