42621347 has 2 divisors, whose sum is σ = 42621348. Its totient is φ = 42621346.

The previous prime is 42621343. The next prime is 42621349. The reversal of 42621347 is 74312624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42621347 - 2² = 42621343 is a prime.

Together with 42621349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42621343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21310673 + 21310674.

It is an arithmetic number, because the mean of its divisors is an integer number (21310674).

Almost surely, 2^42621347 is an apocalyptic number.

42621347 is a deficient number, since it is larger than the sum of its proper divisors (1).

42621347 is an equidigital number, since it uses as much as digits as its factorization.

42621347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 42621347 is about 6528.5026614071. The cubic root of 42621347 is about 349.3084221411.

The spelling of 42621347 in words is "forty-two million, six hundred twenty-one thousand, three hundred forty-seven".