1813741 has 2 divisors, whose sum is σ = 1813742. Its totient is φ = 1813740.

The previous prime is 1813739. The next prime is 1813751. The reversal of 1813741 is 1473181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1811716 + 2025 = 1346^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813741 - 2¹ = 1813739 is a prime.

Together with 1813739, it forms a pair of twin primes.

1813741 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906870 + 906871.

It is an arithmetic number, because the mean of its divisors is an integer number (906871).

2^1813741 is an apocalyptic number.

It is an amenable number.

1813741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813741 is an equidigital number, since it uses as much as digits as its factorization.

1813741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 1813741 is about 1346.7520187473. The cubic root of 1813741 is about 121.9527946011.

The spelling of 1813741 in words is "one million, eight hundred thirteen thousand, seven hundred forty-one".