1241857 has 4 divisors (see below), whose sum is σ = 1244160. Its totient is φ = 1239556.

The previous prime is 1241827. The next prime is 1241869. The reversal of 1241857 is 7581421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7581421 = 23 ⋅329627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (311040).

2^1241857 is an apocalyptic number.

It is an amenable number.

1241857 is a deficient number, since it is larger than the sum of its proper divisors (2303).

1241857 is an equidigital number, since it uses as much as digits as its factorization.

1241857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302.

The product of its digits is 2240, while the sum is 28.

The square root of 1241857 is about 1114.3863782369. The cubic root of 1241857 is about 107.4873105628.

The spelling of 1241857 in words is "one million, two hundred forty-one thousand, eight hundred fifty-seven".