1065221887 has 4 divisors (see below), whose sum is σ = 1127882016. Its totient is φ = 1002561760.

The previous prime is 1065221873. The next prime is 1065221903. The reversal of 1065221887 is 7881225601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881225601 = 23747 ⋅331883.

It is a cyclic number.

It is not a de Polignac number, because 1065221887 - 2¹⁵ = 1065189119 is a prime.

It is a super-3 number, since 3×1065221887³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065221827) 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, 31330039 + ... + 31330072.

It is an arithmetic number, because the mean of its divisors is an integer number (281970504).

Almost surely, 2^1065221887 is an apocalyptic number.

1065221887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1065221887 is a deficient number, since it is larger than the sum of its proper divisors (62660129).

1065221887 is an equidigital number, since it uses as much as digits as its factorization.

1065221887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62660128.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1065221887 is about 32637.7371611452. The cubic root of 1065221887 is about 1021.2843896359.

The spelling of 1065221887 in words is "one billion, sixty-five million, two hundred twenty-one thousand, eight hundred eighty-seven".