1500649 has 2 divisors, whose sum is σ = 1500650. Its totient is φ = 1500648.

The previous prime is 1500647. The next prime is 1500691. The reversal of 1500649 is 9460051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 632025 = 932^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1500649 - 2¹ = 1500647 is a prime.

Together with 1500647, it forms a pair of twin primes.

1500649 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1500643) 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, 750324 + 750325.

It is an arithmetic number, because the mean of its divisors is an integer number (750325).

2^1500649 is an apocalyptic number.

It is an amenable number.

1500649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1500649 is an equidigital number, since it uses as much as digits as its factorization.

1500649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1500649 is about 1225.0097958792. The cubic root of 1500649 is about 114.4879311981.

The spelling of 1500649 in words is "one million, five hundred thousand, six hundred forty-nine".