1535987 has 2 divisors, whose sum is σ = 1535988. Its totient is φ = 1535986.

The previous prime is 1535971. The next prime is 1536011. The reversal of 1535987 is 7895351.

It is a weak prime.

It is an emirp because it is prime and its reverse (7895351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1535987 - 2⁴ = 1535971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1535987.

It is not a weakly prime, because it can be changed into another prime (1535587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767993 + 767994.

It is an arithmetic number, because the mean of its divisors is an integer number (767994).

2^1535987 is an apocalyptic number.

1535987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1535987 is an equidigital number, since it uses as much as digits as its factorization.

1535987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 1535987 is about 1239.3494261103. The cubic root of 1535987 is about 115.3796401160.

The spelling of 1535987 in words is "one million, five hundred thirty-five thousand, nine hundred eighty-seven".