1581145102 has 16 divisors (see below), whose sum is σ = 2397874752. Its totient is φ = 781871200.

The previous prime is 1581145073. The next prime is 1581145123. The reversal of 1581145102 is 2015411851.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 200763 + ... + 208489.

It is an arithmetic number, because the mean of its divisors is an integer number (149867172).

Almost surely, 2^1581145102 is an apocalyptic number.

1581145102 is a deficient number, since it is larger than the sum of its proper divisors (816729650).

1581145102 is a wasteful number, since it uses less digits than its factorization.

1581145102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 1581145102 is about 39763.6153034404. The cubic root of 1581145102 is about 1164.9945911444.

Adding to 1581145102 its reverse (2015411851), we get a palindrome (3596556953).

It can be divided in two parts, 158114 and 5102, that added together give a square (163216 = 404²).

The spelling of 1581145102 in words is "one billion, five hundred eighty-one million, one hundred forty-five thousand, one hundred two".