1556120146 has 12 divisors (see below), whose sum is σ = 2715271038. Its totient is φ = 666908592.

The previous prime is 1556120141. The next prime is 1556120161. The reversal of 1556120146 is 6410216551.

It can be written as a sum of positive squares in only one way, i.e., 1164515625 + 391604521 = 34125^2 + 19789^2 .

It is a super-2 number, since 2×1556120146² = 4843019817574122632, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7939291 + ... + 7939486.

Almost surely, 2^1556120146 is an apocalyptic number.

1556120146 is a deficient number, since it is larger than the sum of its proper divisors (1159150892).

1556120146 is a wasteful number, since it uses less digits than its factorization.

1556120146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15878793 (or 15878786 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1556120146 is about 39447.6887282386. The cubic root of 1556120146 is about 1158.8157121556.

Adding to 1556120146 its reverse (6410216551), we get a palindrome (7966336697).

The spelling of 1556120146 in words is "one billion, five hundred fifty-six million, one hundred twenty thousand, one hundred forty-six".