342556421 has 2 divisors, whose sum is σ = 342556422. Its totient is φ = 342556420.

The previous prime is 342556387. The next prime is 342556427. The reversal of 342556421 is 124655243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259564321 + 82992100 = 16111^2 + 9110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342556421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342556427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171278210 + 171278211.

It is an arithmetic number, because the mean of its divisors is an integer number (171278211).

Almost surely, 2^342556421 is an apocalyptic number.

It is an amenable number.

342556421 is a deficient number, since it is larger than the sum of its proper divisors (1).

342556421 is an equidigital number, since it uses as much as digits as its factorization.

342556421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 32.

The square root of 342556421 is about 18508.2797958103. The cubic root of 342556421 is about 699.6981154051.

The spelling of 342556421 in words is "three hundred forty-two million, five hundred fifty-six thousand, four hundred twenty-one".