42091307 has 4 divisors (see below), whose sum is σ = 42525336. Its totient is φ = 41657280.

The previous prime is 42091277. The next prime is 42091319. The reversal of 42091307 is 70319024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42091307 - 2¹² = 42087211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42091207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216869 + ... + 217062.

It is an arithmetic number, because the mean of its divisors is an integer number (10631334).

Almost surely, 2^42091307 is an apocalyptic number.

42091307 is a deficient number, since it is larger than the sum of its proper divisors (434029).

42091307 is an equidigital number, since it uses as much as digits as its factorization.

42091307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434028.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 42091307 is about 6487.7813619141. The cubic root of 42091307 is about 347.8543754776.

The spelling of 42091307 in words is "forty-two million, ninety-one thousand, three hundred seven".