1390247 has 2 divisors, whose sum is σ = 1390248. Its totient is φ = 1390246.

The previous prime is 1390241. The next prime is 1390253. The reversal of 1390247 is 7420931.

It is a balanced prime because it is at equal distance from previous prime (1390241) and next prime (1390253).

It is a cyclic number.

It is not a de Polignac number, because 1390247 - 2⁸ = 1389991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695123 + 695124.

It is an arithmetic number, because the mean of its divisors is an integer number (695124).

2^1390247 is an apocalyptic number.

1390247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390247 is an equidigital number, since it uses as much as digits as its factorization.

1390247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1390247 is about 1179.0873589349. The cubic root of 1390247 is about 111.6085130730.

The spelling of 1390247 in words is "one million, three hundred ninety thousand, two hundred forty-seven".