1421612921 has 2 divisors, whose sum is σ = 1421612922. Its totient is φ = 1421612920.

The previous prime is 1421612903. The next prime is 1421612939. The reversal of 1421612921 is 1292161241.

It is a balanced prime because it is at equal distance from previous prime (1421612903) and next prime (1421612939).

It can be written as a sum of positive squares in only one way, i.e., 1356890896 + 64722025 = 36836^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421612921 - 2¹⁰ = 1421611897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421642921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710806460 + 710806461.

It is an arithmetic number, because the mean of its divisors is an integer number (710806461).

Almost surely, 2^1421612921 is an apocalyptic number.

It is an amenable number.

1421612921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421612921 is an equidigital number, since it uses as much as digits as its factorization.

1421612921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 1421612921 is about 37704.2825286465. The cubic root of 1421612921 is about 1124.4162689567.

The spelling of 1421612921 in words is "one billion, four hundred twenty-one million, six hundred twelve thousand, nine hundred twenty-one".