1581041 has 8 divisors (see below), whose sum is σ = 1971264. Its totient is φ = 1231920.

The previous prime is 1581037. The next prime is 1581053. The reversal of 1581041 is 1401851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1581041 - 2² = 1581037 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1581011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10190 + ... + 10343.

It is an arithmetic number, because the mean of its divisors is an integer number (246408).

2^1581041 is an apocalyptic number.

1581041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1581041 is a deficient number, since it is larger than the sum of its proper divisors (390223).

1581041 is a wasteful number, since it uses less digits than its factorization.

1581041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20551.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 1581041 is about 1257.3945283800. The cubic root of 1581041 is about 116.4969022981.

Adding to 1581041 its reverse (1401851), we get a palindrome (2982892).

It can be divided in two parts, 15810 and 41, that added together give a palindrome (15851).

The spelling of 1581041 in words is "one million, five hundred eighty-one thousand, forty-one".