1042139069 has 2 divisors, whose sum is σ = 1042139070. Its totient is φ = 1042139068.

The previous prime is 1042139057. The next prime is 1042139093. The reversal of 1042139069 is 9609312401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903723844 + 138415225 = 30062^2 + 11765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042139069 - 2²⁰ = 1041090493 is a prime.

It is a super-2 number, since 2×1042139069² = 2172107678272373522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042139009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521069534 + 521069535.

It is an arithmetic number, because the mean of its divisors is an integer number (521069535).

Almost surely, 2^1042139069 is an apocalyptic number.

It is an amenable number.

1042139069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042139069 is an equidigital number, since it uses as much as digits as its factorization.

1042139069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1042139069 is about 32282.1788143242. The cubic root of 1042139069 is about 1013.8535492451.

The spelling of 1042139069 in words is "one billion, forty-two million, one hundred thirty-nine thousand, sixty-nine".