1557063 has 20 divisors (see below), whose sum is σ = 2381280. Its totient is φ = 1013472.

The previous prime is 1557053. The next prime is 1557067. The reversal of 1557063 is 3607551.

It is not a de Polignac number, because 1557063 - 2⁹ = 1556551 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557067) 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 19 ways as a sum of consecutive naturals, for example, 3603 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (119064).

2^1557063 is an apocalyptic number.

1557063 is a deficient number, since it is larger than the sum of its proper divisors (824217).

1557063 is an equidigital number, since it uses as much as digits as its factorization.

1557063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 1557063 is about 1247.8233047992. The cubic root of 1557063 is about 115.9049707249.

The spelling of 1557063 in words is "one million, five hundred fifty-seven thousand, sixty-three".