1082585391 has 4 divisors (see below), whose sum is σ = 1443447192. Its totient is φ = 721723592.

The previous prime is 1082585359. The next prime is 1082585407. The reversal of 1082585391 is 1935852801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1935852801 = 3 ⋅645284267.

It is a cyclic number.

It is not a de Polignac number, because 1082585391 - 2⁵ = 1082585359 is a prime.

It is a super-2 number, since 2×1082585391² = 2343982257613245762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1082585191) 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, 180430896 + ... + 180430901.

It is an arithmetic number, because the mean of its divisors is an integer number (360861798).

Almost surely, 2^1082585391 is an apocalyptic number.

1082585391 is a deficient number, since it is larger than the sum of its proper divisors (360861801).

1082585391 is an equidigital number, since it uses as much as digits as its factorization.

1082585391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360861800.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 1082585391 is about 32902.6654087477. The cubic root of 1082585391 is about 1026.8036112208.

The spelling of 1082585391 in words is "one billion, eighty-two million, five hundred eighty-five thousand, three hundred ninety-one".