1429991 has 4 divisors (see below), whose sum is σ = 1432512. Its totient is φ = 1427472.

The previous prime is 1429969. The next prime is 1430027. The reversal of 1429991 is 1999241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1999241 = 137 ⋅14593.

It is a cyclic number.

It is not a de Polignac number, because 1429991 - 2⁶ = 1429927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1429951) 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, 35 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (358128).

2^1429991 is an apocalyptic number.

1429991 is a deficient number, since it is larger than the sum of its proper divisors (2521).

1429991 is an equidigital number, since it uses as much as digits as its factorization.

1429991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520.

The product of its digits is 5832, while the sum is 35.

The square root of 1429991 is about 1195.8223112152. The cubic root of 1429991 is about 112.6620807785.

The spelling of 1429991 in words is "one million, four hundred twenty-nine thousand, nine hundred ninety-one".