1421404109 has 2 divisors, whose sum is σ = 1421404110. Its totient is φ = 1421404108.

The previous prime is 1421404091. The next prime is 1421404169. The reversal of 1421404109 is 9014041241.

Together with previous prime (1421404091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048334884 + 373069225 = 32378^2 + 19315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421404109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421404169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710702054 + 710702055.

It is an arithmetic number, because the mean of its divisors is an integer number (710702055).

Almost surely, 2^1421404109 is an apocalyptic number.

It is an amenable number.

1421404109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421404109 is an equidigital number, since it uses as much as digits as its factorization.

1421404109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1421404109 is about 37701.5133515884. The cubic root of 1421404109 is about 1124.3612133919.

The spelling of 1421404109 in words is "one billion, four hundred twenty-one million, four hundred four thousand, one hundred nine".