1581056125 has 16 divisors (see below), whose sum is σ = 2152537920. Its totient is φ = 1149858000.

The previous prime is 1581056123. The next prime is 1581056131. The reversal of 1581056125 is 5216501851.

It is not a de Polignac number, because 1581056125 - 2¹ = 1581056123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581056123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573555 + ... + 576304.

It is an arithmetic number, because the mean of its divisors is an integer number (134533620).

Almost surely, 2^1581056125 is an apocalyptic number.

It is an amenable number.

1581056125 is a deficient number, since it is larger than the sum of its proper divisors (571481795).

1581056125 is a wasteful number, since it uses less digits than its factorization.

1581056125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149885 (or 1149875 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

The square root of 1581056125 is about 39762.4964633761. The cubic root of 1581056125 is about 1164.9727378542.

Adding to 1581056125 its reverse (5216501851), we get a palindrome (6797557976).

The spelling of 1581056125 in words is "one billion, five hundred eighty-one million, fifty-six thousand, one hundred twenty-five".