42292421 has 2 divisors, whose sum is σ = 42292422. Its totient is φ = 42292420.

The previous prime is 42292417. The next prime is 42292427. The reversal of 42292421 is 12429224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 7317025 = 5914^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 42292421 - 2² = 42292417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42292427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21146210 + 21146211.

It is an arithmetic number, because the mean of its divisors is an integer number (21146211).

Almost surely, 2^42292421 is an apocalyptic number.

It is an amenable number.

42292421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42292421 is an equidigital number, since it uses as much as digits as its factorization.

42292421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 42292421 is about 6503.2623351669. The cubic root of 42292421 is about 348.4075162828.

The spelling of 42292421 in words is "forty-two million, two hundred ninety-two thousand, four hundred twenty-one".