1494781 has 2 divisors, whose sum is σ = 1494782. Its totient is φ = 1494780.

The previous prime is 1494743. The next prime is 1494799. The reversal of 1494781 is 1874941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756900 + 737881 = 870^2 + 859^2 .

It is an emirp because it is prime and its reverse (1874941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1494781 - 2¹⁹ = 970493 is a prime.

It is a super-2 number, since 2×1494781² = 4468740475922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

1494781 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1494481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747390 + 747391.

It is an arithmetic number, because the mean of its divisors is an integer number (747391).

2^1494781 is an apocalyptic number.

It is an amenable number.

1494781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1494781 is an equidigital number, since it uses as much as digits as its factorization.

1494781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 1494781 is about 1222.6123670240. The cubic root of 1494781 is about 114.3385085692.

The spelling of 1494781 in words is "one million, four hundred ninety-four thousand, seven hundred eighty-one".