1404581 has 2 divisors, whose sum is σ = 1404582. Its totient is φ = 1404580.

The previous prime is 1404577. The next prime is 1404583. The reversal of 1404581 is 1854041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 422500 = 991^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404581 - 2² = 1404577 is a prime.

It is a super-2 number, since 2×1404581² = 3945695571122, which contains 22 as substring.

Together with 1404583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1404583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702290 + 702291.

It is an arithmetic number, because the mean of its divisors is an integer number (702291).

2^1404581 is an apocalyptic number.

It is an amenable number.

1404581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404581 is an equidigital number, since it uses as much as digits as its factorization.

1404581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1404581 is about 1185.1502014513. The cubic root of 1404581 is about 111.9907783649.

The spelling of 1404581 in words is "one million, four hundred four thousand, five hundred eighty-one".