1305220542 has 32 divisors (see below), whose sum is σ = 2749459200. Its totient is φ = 411931008.

The previous prime is 1305220531. The next prime is 1305220571. The reversal of 1305220542 is 2450225031.

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 15 ways as a sum of consecutive naturals, for example, 364959 + ... + 368517.

It is an arithmetic number, because the mean of its divisors is an integer number (85920600).

Almost surely, 2^1305220542 is an apocalyptic number.

1305220542 is an abundant number, since it is smaller than the sum of its proper divisors (1444238658).

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

1305220542 is a wasteful number, since it uses less digits than its factorization.

1305220542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1305220542 is about 36127.8361101243. The cubic root of 1305220542 is about 1092.8518708716.

Adding to 1305220542 its reverse (2450225031), we get a palindrome (3755445573).

The spelling of 1305220542 in words is "one billion, three hundred five million, two hundred twenty thousand, five hundred forty-two".