1428481 has 4 divisors (see below), whose sum is σ = 1463364. Its totient is φ = 1393600.

The previous prime is 1428473. The next prime is 1428491. The reversal of 1428481 is 1848241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 1299600 = 359^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428481 - 2³ = 1428473 is a prime.

It is a super-2 number, since 2×1428481² = 4081115934722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17380 + ... + 17461.

It is an arithmetic number, because the mean of its divisors is an integer number (365841).

2^1428481 is an apocalyptic number.

It is an amenable number.

1428481 is a deficient number, since it is larger than the sum of its proper divisors (34883).

1428481 is an equidigital number, since it uses as much as digits as its factorization.

1428481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34882.

The product of its digits is 2048, while the sum is 28.

The square root of 1428481 is about 1195.1907797502. The cubic root of 1428481 is about 112.6224116112.

It can be divided in two parts, 14284 and 81, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 1428481 in words is "one million, four hundred twenty-eight thousand, four hundred eighty-one".