1421343731 has 2 divisors, whose sum is σ = 1421343732. Its totient is φ = 1421343730.

The previous prime is 1421343727. The next prime is 1421343743. The reversal of 1421343731 is 1373431241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421343731 - 2² = 1421343727 is a prime.

It is a super-2 number, since 2×1421343731² = 4040436003306000722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421343694 and 1421343703.

It is not a weakly prime, because it can be changed into another prime (1421343751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710671865 + 710671866.

It is an arithmetic number, because the mean of its divisors is an integer number (710671866).

Almost surely, 2^1421343731 is an apocalyptic number.

1421343731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421343731 is an equidigital number, since it uses as much as digits as its factorization.

1421343731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 1421343731 is about 37700.7126059973. The cubic root of 1421343731 is about 1124.3452930678.

Adding to 1421343731 its reverse (1373431241), we get a palindrome (2794774972).

The spelling of 1421343731 in words is "one billion, four hundred twenty-one million, three hundred forty-three thousand, seven hundred thirty-one".