1344781 has 2 divisors, whose sum is σ = 1344782. Its totient is φ = 1344780.

The previous prime is 1344779. The next prime is 1344793. The reversal of 1344781 is 1874431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 275625 = 1034^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344781 - 2¹ = 1344779 is a prime.

It is a super-2 number, since 2×1344781² = 3616871875922, which contains 22 as substring.

Together with 1344779, it forms a pair of twin primes.

1344781 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672390 + 672391.

It is an arithmetic number, because the mean of its divisors is an integer number (672391).

2^1344781 is an apocalyptic number.

It is an amenable number.

1344781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344781 is an equidigital number, since it uses as much as digits as its factorization.

1344781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 1344781 is about 1159.6469290262. The cubic root of 1344781 is about 110.3783391043.

The spelling of 1344781 in words is "one million, three hundred forty-four thousand, seven hundred eighty-one".