1557049 has 4 divisors (see below), whose sum is σ = 1676836. Its totient is φ = 1437264.

The previous prime is 1557043. The next prime is 1557053. The reversal of 1557049 is 9407551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 846400 + 710649 = 920^2 + 843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557049 - 2³ = 1557041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1557049.

It is not an unprimeable number, because it can be changed into a prime (1557041) 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 3 ways as a sum of consecutive naturals, for example, 59874 + ... + 59899.

It is an arithmetic number, because the mean of its divisors is an integer number (419209).

2^1557049 is an apocalyptic number.

It is an amenable number.

1557049 is a deficient number, since it is larger than the sum of its proper divisors (119787).

1557049 is a wasteful number, since it uses less digits than its factorization.

1557049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119786.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1557049 is about 1247.8176950180. The cubic root of 1557049 is about 115.9046233456.

The spelling of 1557049 in words is "one million, five hundred fifty-seven thousand, forty-nine".