1200426247 has 2 divisors, whose sum is σ = 1200426248. Its totient is φ = 1200426246.

The previous prime is 1200426223. The next prime is 1200426263. The reversal of 1200426247 is 7426240021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7426240021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200426247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200426277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600213123 + 600213124.

It is an arithmetic number, because the mean of its divisors is an integer number (600213124).

Almost surely, 2^1200426247 is an apocalyptic number.

1200426247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200426247 is an equidigital number, since it uses as much as digits as its factorization.

1200426247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1200426247 is about 34647.1679506421. The cubic root of 1200426247 is about 1062.7843751290.

Adding to 1200426247 its reverse (7426240021), we get a palindrome (8626666268).

The spelling of 1200426247 in words is "one billion, two hundred million, four hundred twenty-six thousand, two hundred forty-seven".