1894381 has 2 divisors, whose sum is σ = 1894382. Its totient is φ = 1894380.

The previous prime is 1894369. The next prime is 1894393. The reversal of 1894381 is 1834981.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1894369) and next prime (1894393).

It can be written as a sum of positive squares in only one way, i.e., 1798281 + 96100 = 1341^2 + 310^2 .

It is an emirp because it is prime and its reverse (1834981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1894381 - 2⁷ = 1894253 is a prime.

It is a super-2 number, since 2×1894381² = 7177358746322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947190 + 947191.

It is an arithmetic number, because the mean of its divisors is an integer number (947191).

2^1894381 is an apocalyptic number.

It is an amenable number.

1894381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894381 is an equidigital number, since it uses as much as digits as its factorization.

1894381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 1894381 is about 1376.3651405060. The cubic root of 1894381 is about 123.7340162331.

The spelling of 1894381 in words is "one million, eight hundred ninety-four thousand, three hundred eighty-one".