1581412 has 12 divisors (see below), whose sum is σ = 3162880. Its totient is φ = 677736.

The previous prime is 1581379. The next prime is 1581413. The reversal of 1581412 is 2141851.

1581412 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28212 + ... + 28267.

2^1581412 is an apocalyptic number.

It is an amenable number.

1581412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1581412 is a wasteful number, since it uses less digits than its factorization.

1581412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56490 (or 56488 counting only the distinct ones).

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

The square root of 1581412 is about 1257.5420470108. The cubic root of 1581412 is about 116.5060137992.

The spelling of 1581412 in words is "one million, five hundred eighty-one thousand, four hundred twelve".