1872987 has 4 divisors (see below), whose sum is σ = 2497320. Its totient is φ = 1248656.

The previous prime is 1872971. The next prime is 1873013. The reversal of 1872987 is 7892781.

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

It is a cyclic number.

It is not a de Polignac number, because 1872987 - 2⁴ = 1872971 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1872287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312162 + ... + 312167.

It is an arithmetic number, because the mean of its divisors is an integer number (624330).

2^1872987 is an apocalyptic number.

1872987 is a deficient number, since it is larger than the sum of its proper divisors (624333).

1872987 is an equidigital number, since it uses as much as digits as its factorization.

1872987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624332.

The product of its digits is 56448, while the sum is 42.

The square root of 1872987 is about 1368.5711526990. The cubic root of 1872987 is about 123.2664591602.

The spelling of 1872987 in words is "one million, eight hundred seventy-two thousand, nine hundred eighty-seven".