1002142409 has 2 divisors, whose sum is σ = 1002142410. Its totient is φ = 1002142408.

The previous prime is 1002142387. The next prime is 1002142411. The reversal of 1002142409 is 9042412001.

1002142409 is nontrivially palindromic in base 11.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958212025 + 43930384 = 30955^2 + 6628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002142409 is a prime.

Together with 1002142411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1002142439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501071204 + 501071205.

It is an arithmetic number, because the mean of its divisors is an integer number (501071205).

Almost surely, 2^1002142409 is an apocalyptic number.

It is an amenable number.

1002142409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002142409 is an equidigital number, since it uses as much as digits as its factorization.

1002142409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1002142409 is about 31656.6329384538. The cubic root of 1002142409 is about 1000.7136269488.

The spelling of 1002142409 in words is "one billion, two million, one hundred forty-two thousand, four hundred nine".