1857481 has 2 divisors, whose sum is σ = 1857482. Its totient is φ = 1857480.

The previous prime is 1857473. The next prime is 1857509. The reversal of 1857481 is 1847581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1401856 + 455625 = 1184^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1857481 - 2³ = 1857473 is a prime.

It is a super-2 number, since 2×1857481² = 6900471330722, which contains 22 as substring.

1857481 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1857461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928740 + 928741.

It is an arithmetic number, because the mean of its divisors is an integer number (928741).

2^1857481 is an apocalyptic number.

It is an amenable number.

1857481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1857481 is an equidigital number, since it uses as much as digits as its factorization.

1857481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 34.

The square root of 1857481 is about 1362.8943466021. The cubic root of 1857481 is about 122.9253518457.

The spelling of 1857481 in words is "one million, eight hundred fifty-seven thousand, four hundred eighty-one".