1085421587 has 4 divisors (see below), whose sum is σ = 1088128776. Its totient is φ = 1082714400.

The previous prime is 1085421583. The next prime is 1085421637. The reversal of 1085421587 is 7851245801.

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 1085421587 - 2² = 1085421583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085421581) 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, 1352993 + ... + 1353794.

It is an arithmetic number, because the mean of its divisors is an integer number (272032194).

Almost surely, 2^1085421587 is an apocalyptic number.

1085421587 is a deficient number, since it is larger than the sum of its proper divisors (2707189).

1085421587 is an equidigital number, since it uses as much as digits as its factorization.

1085421587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707188.

The product of its (nonzero) digits is 89600, while the sum is 41.

The square root of 1085421587 is about 32945.7370079954. The cubic root of 1085421587 is about 1027.6995149336.

The spelling of 1085421587 in words is "one billion, eighty-five million, four hundred twenty-one thousand, five hundred eighty-seven".