1581071412 has 12 divisors (see below), whose sum is σ = 3689166656. Its totient is φ = 527023800.

The previous prime is 1581071411. The next prime is 1581071467. The reversal of 1581071412 is 2141701851.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1581071412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581071411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65877964 + ... + 65877987.

Almost surely, 2^1581071412 is an apocalyptic number.

1581071412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1581071412 is an abundant number, since it is smaller than the sum of its proper divisors (2108095244).

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

1581071412 is a wasteful number, since it uses less digits than its factorization.

1581071412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131755958 (or 131755956 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 1581071412 is about 39762.6886917874. The cubic root of 1581071412 is about 1164.9764924923.

The spelling of 1581071412 in words is "one billion, five hundred eighty-one million, seventy-one thousand, four hundred twelve".