1026221887 has 4 divisors (see below), whose sum is σ = 1037752560. Its totient is φ = 1014691216.

The previous prime is 1026221837. The next prime is 1026221897. The reversal of 1026221887 is 7881226201.

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 1026221887 - 2²³ = 1017833279 is a prime.

It is a super-3 number, since 3×1026221887³ (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 (1026221837) 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, 5765203 + ... + 5765380.

It is an arithmetic number, because the mean of its divisors is an integer number (259438140).

Almost surely, 2^1026221887 is an apocalyptic number.

1026221887 is a deficient number, since it is larger than the sum of its proper divisors (11530673).

1026221887 is an equidigital number, since it uses as much as digits as its factorization.

1026221887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11530672.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1026221887 is about 32034.6981724504. The cubic root of 1026221887 is about 1008.6653242685.

The spelling of 1026221887 in words is "one billion, twenty-six million, two hundred twenty-one thousand, eight hundred eighty-seven".