1491629 has 2 divisors, whose sum is σ = 1491630. Its totient is φ = 1491628.

The previous prime is 1491601. The next prime is 1491641. The reversal of 1491629 is 9261941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769129 + 722500 = 877^2 + 850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491629 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491595 and 1491604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491649) 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, 745814 + 745815.

It is an arithmetic number, because the mean of its divisors is an integer number (745815).

2^1491629 is an apocalyptic number.

It is an amenable number.

1491629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491629 is an equidigital number, since it uses as much as digits as its factorization.

1491629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 1491629 is about 1221.3226436941. The cubic root of 1491629 is about 114.2580846154.

The spelling of 1491629 in words is "one million, four hundred ninety-one thousand, six hundred twenty-nine".