1409381 has 2 divisors, whose sum is σ = 1409382. Its totient is φ = 1409380.

The previous prime is 1409357. The next prime is 1409393. The reversal of 1409381 is 1839041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 188356 = 1105^2 + 434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1409381 is a prime.

It is a super-2 number, since 2×1409381² = 3972709606322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1409381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1409311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704690 + 704691.

It is an arithmetic number, because the mean of its divisors is an integer number (704691).

2^1409381 is an apocalyptic number.

It is an amenable number.

1409381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409381 is an equidigital number, since it uses as much as digits as its factorization.

1409381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1409381 is about 1187.1735340716. The cubic root of 1409381 is about 112.1182053462.

The spelling of 1409381 in words is "one million, four hundred nine thousand, three hundred eighty-one".