1102581 has 6 divisors (see below), whose sum is σ = 1592630. Its totient is φ = 735048.

The previous prime is 1102571. The next prime is 1102583. The reversal of 1102581 is 1852011.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 81 = 1050^2 + 9^2 .

It is not a de Polignac number, because 1102581 - 2⁹ = 1102069 is a prime.

It is a super-2 number, since 2×1102581² = 2431369723122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102583) 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 5 ways as a sum of consecutive naturals, for example, 61246 + ... + 61263.

2^1102581 is an apocalyptic number.

It is an amenable number.

1102581 is a deficient number, since it is larger than the sum of its proper divisors (490049).

1102581 is a wasteful number, since it uses less digits than its factorization.

1102581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122515 (or 122512 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1102581 is about 1050.0385707201. The cubic root of 1102581 is about 103.3086852994.

Adding to 1102581 its reverse (1852011), we get a palindrome (2954592).

It can be divided in two parts, 11025 and 81, that multiplied together give a square (893025 = 945²).

The spelling of 1102581 in words is "one million, one hundred two thousand, five hundred eighty-one".