1555142005 has 8 divisors (see below), whose sum is σ = 1916607672. Its totient is φ = 1210488768.

The previous prime is 1555141967. The next prime is 1555142021. The reversal of 1555142005 is 5002415551.

It can be written as a sum of positive squares in 4 ways, for example, as 698174929 + 856967076 = 26423^2 + 29274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555142005 is a prime.

It is a Duffinian number.

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, 4202902 + ... + 4203271.

It is an arithmetic number, because the mean of its divisors is an integer number (239575959).

Almost surely, 2^1555142005 is an apocalyptic number.

It is an amenable number.

1555142005 is a deficient number, since it is larger than the sum of its proper divisors (361465667).

1555142005 is an equidigital number, since it uses as much as digits as its factorization.

1555142005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406215.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1555142005 is about 39435.2888286621. The cubic root of 1555142005 is about 1158.5728597127.

Adding to 1555142005 its reverse (5002415551), we get a palindrome (6557557556).

The spelling of 1555142005 in words is "one billion, five hundred fifty-five million, one hundred forty-two thousand, five".