1428947 has 4 divisors (see below), whose sum is σ = 1538880. Its totient is φ = 1319016.

The previous prime is 1428937. The next prime is 1428949. The reversal of 1428947 is 7498241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7498241 = 17 ⋅441073.

It is a cyclic number.

It is not a de Polignac number, because 1428947 - 2¹² = 1424851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428949) 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, 54947 + ... + 54972.

It is an arithmetic number, because the mean of its divisors is an integer number (384720).

2^1428947 is an apocalyptic number.

1428947 is a deficient number, since it is larger than the sum of its proper divisors (109933).

1428947 is a wasteful number, since it uses less digits than its factorization.

1428947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109932.

The product of its digits is 16128, while the sum is 35.

The square root of 1428947 is about 1195.3857118102. The cubic root of 1428947 is about 112.6346568652.

The spelling of 1428947 in words is "one million, four hundred twenty-eight thousand, nine hundred forty-seven".