1040420239 has 2 divisors, whose sum is σ = 1040420240. Its totient is φ = 1040420238.

The previous prime is 1040420231. The next prime is 1040420243. The reversal of 1040420239 is 9320240401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1040420239 - 2³ = 1040420231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040420231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520210119 + 520210120.

It is an arithmetic number, because the mean of its divisors is an integer number (520210120).

Almost surely, 2^1040420239 is an apocalyptic number.

1040420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040420239 is an equidigital number, since it uses as much as digits as its factorization.

1040420239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1040420239 is about 32255.5458642386. The cubic root of 1040420239 is about 1013.2958498971.

The spelling of 1040420239 in words is "one billion, forty million, four hundred twenty thousand, two hundred thirty-nine".