1042139141 has 2 divisors, whose sum is σ = 1042139142. Its totient is φ = 1042139140.

The previous prime is 1042139093. The next prime is 1042139143. The reversal of 1042139141 is 1419312401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861129025 + 181010116 = 29345^2 + 13454^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042139141 - 2¹⁰ = 1042138117 is a prime.

Together with 1042139143, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1042139141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042139143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521069570 + 521069571.

It is an arithmetic number, because the mean of its divisors is an integer number (521069571).

Almost surely, 2^1042139141 is an apocalyptic number.

It is an amenable number.

1042139141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042139141 is an equidigital number, since it uses as much as digits as its factorization.

1042139141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1042139141 is about 32282.1799294905. The cubic root of 1042139141 is about 1013.8535725937.

The spelling of 1042139141 in words is "one billion, forty-two million, one hundred thirty-nine thousand, one hundred forty-one".