1556481 has 8 divisors (see below), whose sum is σ = 2088000. Its totient is φ = 1031312.

The previous prime is 1556473. The next prime is 1556491. The reversal of 1556481 is 1846551.

1556481 = T₃₈ + T₃₉ + ... + T₂₁₀.

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 1556481 - 2³ = 1556473 is a prime.

It is a super-2 number, since 2×1556481² = 4845266206722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1556431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (261000).

It is a Proth number, since it is equal to 95 ⋅ 2¹⁴ + 1 and 95 < 2¹⁴.

2^1556481 is an apocalyptic number.

It is an amenable number.

1556481 is a deficient number, since it is larger than the sum of its proper divisors (531519).

1556481 is a wasteful number, since it uses less digits than its factorization.

1556481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175.

The product of its digits is 4800, while the sum is 30.

The square root of 1556481 is about 1247.5900769083. The cubic root of 1556481 is about 115.8905279140.

The spelling of 1556481 in words is "one million, five hundred fifty-six thousand, four hundred eighty-one".