1288429 has 2 divisors, whose sum is σ = 1288430. Its totient is φ = 1288428.

The previous prime is 1288423. The next prime is 1288439. The reversal of 1288429 is 9248821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 227529 = 1030^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288429 - 2³ = 1288421 is a prime.

1288429 is a lucky number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1288394 and 1288403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644214 + 644215.

It is an arithmetic number, because the mean of its divisors is an integer number (644215).

2^1288429 is an apocalyptic number.

It is an amenable number.

1288429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288429 is an equidigital number, since it uses as much as digits as its factorization.

1288429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 1288429 is about 1135.0898642839. The cubic root of 1288429 is about 108.8145149410.

The spelling of 1288429 in words is "one million, two hundred eighty-eight thousand, four hundred twenty-nine".