1421512243 has 2 divisors, whose sum is σ = 1421512244. Its totient is φ = 1421512242.

The previous prime is 1421512237. The next prime is 1421512247. The reversal of 1421512243 is 3422151241.

It is a strong prime.

It is an emirp because it is prime and its reverse (3422151241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421512243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421512247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710756121 + 710756122.

It is an arithmetic number, because the mean of its divisors is an integer number (710756122).

Almost surely, 2^1421512243 is an apocalyptic number.

1421512243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421512243 is an equidigital number, since it uses as much as digits as its factorization.

1421512243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 1421512243 is about 37702.9474046791. The cubic root of 1421512243 is about 1124.3897247753.

Adding to 1421512243 its reverse (3422151241), we get a palindrome (4843663484).

The spelling of 1421512243 in words is "one billion, four hundred twenty-one million, five hundred twelve thousand, two hundred forty-three".