1055987 has 4 divisors (see below), whose sum is σ = 1071816. Its totient is φ = 1040160.

The previous prime is 1055981. The next prime is 1056007. The reversal of 1055987 is 7895501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895501 = 131 ⋅60271.

It is a cyclic number.

It is not a de Polignac number, because 1055987 - 2⁸ = 1055731 is a prime.

It is a super-2 number, since 2×1055987² = 2230217088338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7814 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (267954).

2^1055987 is an apocalyptic number.

1055987 is a deficient number, since it is larger than the sum of its proper divisors (15829).

1055987 is an equidigital number, since it uses as much as digits as its factorization.

1055987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15828.

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

The square root of 1055987 is about 1027.6122809698. The cubic root of 1055987 is about 101.8324495167.

The spelling of 1055987 in words is "one million, fifty-five thousand, nine hundred eighty-seven".