42226649 has 2 divisors, whose sum is σ = 42226650. Its totient is φ = 42226648.

The previous prime is 42226627. The next prime is 42226651. The reversal of 42226649 is 94662224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42159049 + 67600 = 6493^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 42226649 - 2²⁴ = 25449433 is a prime.

Together with 42226651, 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 (42226609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21113324 + 21113325.

It is an arithmetic number, because the mean of its divisors is an integer number (21113325).

Almost surely, 2^42226649 is an apocalyptic number.

It is an amenable number.

42226649 is a deficient number, since it is larger than the sum of its proper divisors (1).

42226649 is an equidigital number, since it uses as much as digits as its factorization.

42226649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 42226649 is about 6498.2035209741. The cubic root of 42226649 is about 348.2268113397.

It can be divided in two parts, 42226 and 649, that added together give a cube (42875 = 35³).

The spelling of 42226649 in words is "forty-two million, two hundred twenty-six thousand, six hundred forty-nine".