1241581 has 12 divisors (see below), whose sum is σ = 1412992. Its totient is φ = 1089000.

The previous prime is 1241579. The next prime is 1241587. The reversal of 1241581 is 1851421.

It is not a de Polignac number, because 1241581 - 2¹ = 1241579 is a prime.

It is a super-2 number, since 2×1241581² = 3083046759122, 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 (1241587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3586 + ... + 3916.

2^1241581 is an apocalyptic number.

1241581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241581 is a deficient number, since it is larger than the sum of its proper divisors (171411).

1241581 is a wasteful number, since it uses less digits than its factorization.

1241581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 373 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 1241581 is about 1114.2625363890. The cubic root of 1241581 is about 107.4793470329.

The spelling of 1241581 in words is "one million, two hundred forty-one thousand, five hundred eighty-one".