542602139 has 2 divisors, whose sum is σ = 542602140. Its totient is φ = 542602138.

The previous prime is 542602127. The next prime is 542602147. The reversal of 542602139 is 931206245.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542602139 - 2⁸ = 542601883 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (542602339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271301069 + 271301070.

It is an arithmetic number, because the mean of its divisors is an integer number (271301070).

Almost surely, 2^542602139 is an apocalyptic number.

542602139 is a deficient number, since it is larger than the sum of its proper divisors (1).

542602139 is an equidigital number, since it uses as much as digits as its factorization.

542602139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 542602139 is about 23293.8219062480. The cubic root of 542602139 is about 815.6312065978.

The spelling of 542602139 in words is "five hundred forty-two million, six hundred two thousand, one hundred thirty-nine".