1491241 has 2 divisors, whose sum is σ = 1491242. Its totient is φ = 1491240.

The previous prime is 1491239. The next prime is 1491247. The reversal of 1491241 is 1421941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 400 = 1221^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491241 - 2¹ = 1491239 is a prime.

Together with 1491239, it forms a pair of twin primes.

It is equal to p₁₁₃₅₄₈ and since 1491241 and 113548 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1491247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745620 + 745621.

It is an arithmetic number, because the mean of its divisors is an integer number (745621).

2^1491241 is an apocalyptic number.

It is an amenable number.

1491241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491241 is an equidigital number, since it uses as much as digits as its factorization.

1491241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 1491241 is about 1221.1637891782. The cubic root of 1491241 is about 114.2481768834.

The spelling of 1491241 in words is "one million, four hundred ninety-one thousand, two hundred forty-one".