1522987 has 4 divisors (see below), whose sum is σ = 1548016. Its totient is φ = 1497960.

The previous prime is 1522981. The next prime is 1523003. The reversal of 1522987 is 7892251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1522981) 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 in 3 ways as a sum of consecutive naturals, for example, 12423 + ... + 12544.

It is an arithmetic number, because the mean of its divisors is an integer number (387004).

2^1522987 is an apocalyptic number.

1522987 is a deficient number, since it is larger than the sum of its proper divisors (25029).

1522987 is an equidigital number, since it uses as much as digits as its factorization.

1522987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25028.

The product of its digits is 10080, while the sum is 34.

The square root of 1522987 is about 1234.0935945057. The cubic root of 1522987 is about 115.0532078923.

The spelling of 1522987 in words is "one million, five hundred twenty-two thousand, nine hundred eighty-seven".