1340947 has 2 divisors, whose sum is σ = 1340948. Its totient is φ = 1340946.

The previous prime is 1340929. The next prime is 1340959. The reversal of 1340947 is 7490431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1340047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670473 + 670474.

It is an arithmetic number, because the mean of its divisors is an integer number (670474).

2^1340947 is an apocalyptic number.

1340947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340947 is an equidigital number, since it uses as much as digits as its factorization.

1340947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1340947 is about 1157.9926597349. The cubic root of 1340947 is about 110.2733422398.

It can be divided in two parts, 13409 and 47, that added together give a square (13456 = 116²).

The spelling of 1340947 in words is "one million, three hundred forty thousand, nine hundred forty-seven".