1506641 has 2 divisors, whose sum is σ = 1506642. Its totient is φ = 1506640.

The previous prime is 1506623. The next prime is 1506649. The reversal of 1506641 is 1466051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 250000 = 1121^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1506641 - 2¹⁴ = 1490257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1506649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 753320 + 753321.

It is an arithmetic number, because the mean of its divisors is an integer number (753321).

2^1506641 is an apocalyptic number.

It is an amenable number.

1506641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1506641 is an equidigital number, since it uses as much as digits as its factorization.

1506641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1506641 is about 1227.4530540921. The cubic root of 1506641 is about 114.6401099412.

The spelling of 1506641 in words is "one million, five hundred six thousand, six hundred forty-one".