1214143421 has 2 divisors, whose sum is σ = 1214143422. Its totient is φ = 1214143420.

The previous prime is 1214143409. The next prime is 1214143487. The reversal of 1214143421 is 1243414121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828806521 + 385336900 = 28789^2 + 19630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214143421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214145421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607071710 + 607071711.

It is an arithmetic number, because the mean of its divisors is an integer number (607071711).

Almost surely, 2^1214143421 is an apocalyptic number.

It is an amenable number.

1214143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214143421 is an equidigital number, since it uses as much as digits as its factorization.

1214143421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 1214143421 is about 34844.5608524487. The cubic root of 1214143421 is about 1066.8171702456.

Adding to 1214143421 its reverse (1243414121), we get a palindrome (2457557542).

The spelling of 1214143421 in words is "one billion, two hundred fourteen million, one hundred forty-three thousand, four hundred twenty-one".