342121139 has 2 divisors, whose sum is σ = 342121140. Its totient is φ = 342121138.

The previous prime is 342121121. The next prime is 342121147. The reversal of 342121139 is 931121243.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 342121139 - 2¹² = 342117043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342121639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171060569 + 171060570.

It is an arithmetic number, because the mean of its divisors is an integer number (171060570).

Almost surely, 2^342121139 is an apocalyptic number.

342121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

342121139 is an equidigital number, since it uses as much as digits as its factorization.

342121139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 342121139 is about 18496.5169423867. The cubic root of 342121139 is about 699.4016240144.

The spelling of 342121139 in words is "three hundred forty-two million, one hundred twenty-one thousand, one hundred thirty-nine".