1040381 has 2 divisors, whose sum is σ = 1040382. Its totient is φ = 1040380.

The previous prime is 1040371. The next prime is 1040387. The reversal of 1040381 is 1830401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 302500 = 859^2 + 550^2 .

It is an emirp because it is prime and its reverse (1830401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1040381 - 2¹⁸ = 778237 is a prime.

It is a super-2 number, since 2×1040381² = 2164785250322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520190 + 520191.

It is an arithmetic number, because the mean of its divisors is an integer number (520191).

2^1040381 is an apocalyptic number.

It is an amenable number.

1040381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040381 is an equidigital number, since it uses as much as digits as its factorization.

1040381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1040381 is about 1019.9906862320. The cubic root of 1040381 is about 101.3283111065.

Adding to 1040381 its reverse (1830401), we get a palindrome (2870782).

The spelling of 1040381 in words is "one million, forty thousand, three hundred eighty-one".