1340407 has 2 divisors, whose sum is σ = 1340408. Its totient is φ = 1340406.

The previous prime is 1340401. The next prime is 1340411. The reversal of 1340407 is 7040431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670203 + 670204.

It is an arithmetic number, because the mean of its divisors is an integer number (670204).

2^1340407 is an apocalyptic number.

1340407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340407 is an equidigital number, since it uses as much as digits as its factorization.

1340407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1340407 is about 1157.7594741569. The cubic root of 1340407 is about 110.2585378764.

Adding to 1340407 its reverse (7040431), we get a palindrome (8380838).

The spelling of 1340407 in words is "one million, three hundred forty thousand, four hundred seven".