42105407 has 2 divisors, whose sum is σ = 42105408. Its totient is φ = 42105406.

The previous prime is 42105391. The next prime is 42105449. The reversal of 42105407 is 70450124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42105407 - 2⁴ = 42105391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42105607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21052703 + 21052704.

It is an arithmetic number, because the mean of its divisors is an integer number (21052704).

Almost surely, 2^42105407 is an apocalyptic number.

42105407 is a deficient number, since it is larger than the sum of its proper divisors (1).

42105407 is an equidigital number, since it uses as much as digits as its factorization.

42105407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42105407 is about 6488.8679289996. The cubic root of 42105407 is about 347.8932132604.

The spelling of 42105407 in words is "forty-two million, one hundred five thousand, four hundred seven".