1421213429 has 2 divisors, whose sum is σ = 1421213430. Its totient is φ = 1421213428.

The previous prime is 1421213407. The next prime is 1421213459. The reversal of 1421213429 is 9243121241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420536100 + 677329 = 37690^2 + 823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421213429 is a prime.

It is a super-2 number, since 2×1421213429² = 4039695221539876082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421213459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710606714 + 710606715.

It is an arithmetic number, because the mean of its divisors is an integer number (710606715).

Almost surely, 2^1421213429 is an apocalyptic number.

It is an amenable number.

1421213429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421213429 is an equidigital number, since it uses as much as digits as its factorization.

1421213429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 1421213429 is about 37698.9844558179. The cubic root of 1421213429 is about 1124.3109338169.

The spelling of 1421213429 in words is "one billion, four hundred twenty-one million, two hundred thirteen thousand, four hundred twenty-nine".