1491769 has 2 divisors, whose sum is σ = 1491770. Its totient is φ = 1491768.

The previous prime is 1491761. The next prime is 1491773. The reversal of 1491769 is 9671941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 308025 = 1088^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491769 - 2³ = 1491761 is a prime.

It is a super-2 number, since 2×1491769² = 4450749498722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1491761) 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, 745884 + 745885.

It is an arithmetic number, because the mean of its divisors is an integer number (745885).

2^1491769 is an apocalyptic number.

It is an amenable number.

1491769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491769 is an equidigital number, since it uses as much as digits as its factorization.

1491769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 1491769 is about 1221.3799572615. The cubic root of 1491769 is about 114.2616591485.

The spelling of 1491769 in words is "one million, four hundred ninety-one thousand, seven hundred sixty-nine".