1894481 has 2 divisors, whose sum is σ = 1894482. Its totient is φ = 1894480.

The previous prime is 1894439. The next prime is 1894489. The reversal of 1894481 is 1844981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 781456 = 1055^2 + 884^2 .

It is an emirp because it is prime and its reverse (1844981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1894481 - 2¹⁰ = 1893457 is a prime.

It is a super-2 number, since 2×1894481² = 7178116518722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1894489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947240 + 947241.

It is an arithmetic number, because the mean of its divisors is an integer number (947241).

2^1894481 is an apocalyptic number.

It is an amenable number.

1894481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894481 is an equidigital number, since it uses as much as digits as its factorization.

1894481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 35.

The square root of 1894481 is about 1376.4014675958. The cubic root of 1894481 is about 123.7361934058.

The spelling of 1894481 in words is "one million, eight hundred ninety-four thousand, four hundred eighty-one".