1941781 has 4 divisors (see below), whose sum is σ = 2044000. Its totient is φ = 1839564.

The previous prime is 1941763. The next prime is 1941799. The reversal of 1941781 is 1871491.

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.

It is an interprime number because it is at equal distance from previous prime (1941763) and next prime (1941799).

It is a cyclic number.

It is not a de Polignac number, because 1941781 - 2¹¹ = 1939733 is a prime.

It is a super-2 number, since 2×1941781² = 7541026903922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1941721) 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, 51081 + ... + 51118.

It is an arithmetic number, because the mean of its divisors is an integer number (511000).

2^1941781 is an apocalyptic number.

It is an amenable number.

1941781 is a deficient number, since it is larger than the sum of its proper divisors (102219).

1941781 is a wasteful number, since it uses less digits than its factorization.

1941781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102218.

The product of its digits is 2016, while the sum is 31.

The square root of 1941781 is about 1393.4780227905. The cubic root of 1941781 is about 124.7575246163.

The spelling of 1941781 in words is "one million, nine hundred forty-one thousand, seven hundred eighty-one".