1557241 has 8 divisors (see below), whose sum is σ = 1788480. Its totient is φ = 1328208.

The previous prime is 1557239. The next prime is 1557247. The reversal of 1557241 is 1427551.

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

It is not a de Polignac number, because 1557241 - 2¹ = 1557239 is a prime.

It is a Duffinian number.

1557241 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1557247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (223560).

2^1557241 is an apocalyptic number.

It is an amenable number.

1557241 is a deficient number, since it is larger than the sum of its proper divisors (231239).

1557241 is an equidigital number, since it uses as much as digits as its factorization.

1557241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103.

The product of its digits is 1400, while the sum is 25.

The square root of 1557241 is about 1247.8946269617. The cubic root of 1557241 is about 115.9093872233.

It can be divided in two parts, 155 and 7241, that added together give a square (7396 = 86²).

The spelling of 1557241 in words is "one million, five hundred fifty-seven thousand, two hundred forty-one".