1247947 has 2 divisors, whose sum is σ = 1247948. Its totient is φ = 1247946.

The previous prime is 1247923. The next prime is 1247951. The reversal of 1247947 is 7497421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1247447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623973 + 623974.

It is an arithmetic number, because the mean of its divisors is an integer number (623974).

2^1247947 is an apocalyptic number.

1247947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247947 is an equidigital number, since it uses as much as digits as its factorization.

1247947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 1247947 is about 1117.1154819445. The cubic root of 1247947 is about 107.6627281269.

The spelling of 1247947 in words is "one million, two hundred forty-seven thousand, nine hundred forty-seven".