1556120147 has 8 divisors (see below), whose sum is σ = 1565648832. Its totient is φ = 1546612200.

The previous prime is 1556120141. The next prime is 1556120161. The reversal of 1556120147 is 7410216551.

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

It is a cyclic number.

It is not a de Polignac number, because 1556120147 - 2⁸ = 1556119891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1556120141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161372 + ... + 170742.

It is an arithmetic number, because the mean of its divisors is an integer number (195706104).

Almost surely, 2^1556120147 is an apocalyptic number.

1556120147 is a deficient number, since it is larger than the sum of its proper divisors (9528685).

1556120147 is an equidigital number, since it uses as much as digits as its factorization.

1556120147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10369.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1556120147 is about 39447.6887409136. The cubic root of 1556120147 is about 1158.8157124039.

Adding to 1556120147 its reverse (7410216551), we get a palindrome (8966336698).

The spelling of 1556120147 in words is "one billion, five hundred fifty-six million, one hundred twenty thousand, one hundred forty-seven".