1238947 has 2 divisors, whose sum is σ = 1238948. Its totient is φ = 1238946.

The previous prime is 1238921. The next prime is 1238989. The reversal of 1238947 is 7498321.

It is a weak prime.

It is an emirp because it is prime and its reverse (7498321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238947 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1238917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619473 + 619474.

It is an arithmetic number, because the mean of its divisors is an integer number (619474).

2^1238947 is an apocalyptic number.

1238947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238947 is an equidigital number, since it uses as much as digits as its factorization.

1238947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 1238947 is about 1113.0799611888. The cubic root of 1238947 is about 107.4032878163.

The spelling of 1238947 in words is "one million, two hundred thirty-eight thousand, nine hundred forty-seven".