1001021429 has 2 divisors, whose sum is σ = 1001021430. Its totient is φ = 1001021428.

The previous prime is 1001021401. The next prime is 1001021443. The reversal of 1001021429 is 9241201001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531302500 + 469718929 = 23050^2 + 21673^2 .

It is an emirp because it is prime and its reverse (9241201001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001021429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001021429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001021459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500510714 + 500510715.

It is an arithmetic number, because the mean of its divisors is an integer number (500510715).

Almost surely, 2^1001021429 is an apocalyptic number.

It is an amenable number.

1001021429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001021429 is an equidigital number, since it uses as much as digits as its factorization.

1001021429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1001021429 is about 31638.9226902561. The cubic root of 1001021429 is about 1000.3403604749.

The spelling of 1001021429 in words is "one billion, one million, twenty-one thousand, four hundred twenty-nine".