1491247 has 2 divisors, whose sum is σ = 1491248. Its totient is φ = 1491246.

The previous prime is 1491241. The next prime is 1491271. The reversal of 1491247 is 7421941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491247 - 2³ = 1491239 is a prime.

1491247 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745623 + 745624.

It is an arithmetic number, because the mean of its divisors is an integer number (745624).

2^1491247 is an apocalyptic number.

1491247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491247 is an equidigital number, since it uses as much as digits as its factorization.

1491247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1491247 is about 1221.1662458486. The cubic root of 1491247 is about 114.2483301088.

The spelling of 1491247 in words is "one million, four hundred ninety-one thousand, two hundred forty-seven".