42400207 has 2 divisors, whose sum is σ = 42400208. Its totient is φ = 42400206.

The previous prime is 42400181. The next prime is 42400243. The reversal of 42400207 is 70200424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42400207 - 2¹¹ = 42398159 is a prime.

It is equal to p_2570500 and since 42400207 and 2570500 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42400297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200103 + 21200104.

It is an arithmetic number, because the mean of its divisors is an integer number (21200104).

Almost surely, 2^42400207 is an apocalyptic number.

42400207 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400207 is an equidigital number, since it uses as much as digits as its factorization.

42400207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 42400207 is about 6511.5441333066. The cubic root of 42400207 is about 348.7032477164.

The spelling of 42400207 in words is "forty-two million, four hundred thousand, two hundred seven".