1987055 has 8 divisors (see below), whose sum is σ = 2725152. Its totient is φ = 1362528.

The previous prime is 1987049. The next prime is 1987057. The reversal of 1987055 is 5507891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1987055 - 2⁶ = 1986991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 56773 = 1987055 / (1 + 9 + 8 + 7 + 0 + 5 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28352 + ... + 28421.

It is an arithmetic number, because the mean of its divisors is an integer number (340644).

2^1987055 is an apocalyptic number.

1987055 is a deficient number, since it is larger than the sum of its proper divisors (738097).

1987055 is an equidigital number, since it uses as much as digits as its factorization.

1987055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56785.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 1987055 is about 1409.6293839162. The cubic root of 1987055 is about 125.7196884361.

The spelling of 1987055 in words is "one million, nine hundred eighty-seven thousand, fifty-five".