1516987 has 2 divisors, whose sum is σ = 1516988. Its totient is φ = 1516986.

The previous prime is 1516967. The next prime is 1517023. The reversal of 1516987 is 7896151.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1516987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1516967) 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, 758493 + 758494.

It is an arithmetic number, because the mean of its divisors is an integer number (758494).

2^1516987 is an apocalyptic number.

1516987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516987 is an equidigital number, since it uses as much as digits as its factorization.

1516987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 1516987 is about 1231.6602615981. The cubic root of 1516987 is about 114.9019201553.

The spelling of 1516987 in words is "one million, five hundred sixteen thousand, nine hundred eighty-seven".