42279407 has 2 divisors, whose sum is σ = 42279408. Its totient is φ = 42279406.

The previous prime is 42279403. The next prime is 42279409. The reversal of 42279407 is 70497224.

It is a happy number.

42279407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42279407 - 2² = 42279403 is a prime.

Together with 42279409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42279401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21139703 + 21139704.

It is an arithmetic number, because the mean of its divisors is an integer number (21139704).

Almost surely, 2^42279407 is an apocalyptic number.

42279407 is a deficient number, since it is larger than the sum of its proper divisors (1).

42279407 is an equidigital number, since it uses as much as digits as its factorization.

42279407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 42279407 is about 6502.2616834452. The cubic root of 42279407 is about 348.3717759109.

The spelling of 42279407 in words is "forty-two million, two hundred seventy-nine thousand, four hundred seven".