1428491 has 2 divisors, whose sum is σ = 1428492. Its totient is φ = 1428490.

The previous prime is 1428473. The next prime is 1428521. The reversal of 1428491 is 1948241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1428491 - 2¹⁴ = 1412107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714245 + 714246.

It is an arithmetic number, because the mean of its divisors is an integer number (714246).

2^1428491 is an apocalyptic number.

1428491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428491 is an equidigital number, since it uses as much as digits as its factorization.

1428491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 1428491 is about 1195.1949631755. The cubic root of 1428491 is about 112.6226744128.

The spelling of 1428491 in words is "one million, four hundred twenty-eight thousand, four hundred ninety-one".