42020307 has 12 divisors (see below), whose sum is σ = 69366960. Its totient is φ = 24011568.

The previous prime is 42020281. The next prime is 42020309. The reversal of 42020307 is 70302024.

It is a happy number.

It is not a de Polignac number, because 42020307 - 2¹² = 42016211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42020307.

It is not an unprimeable number, because it can be changed into a prime (42020309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333432 + ... + 333557.

It is an arithmetic number, because the mean of its divisors is an integer number (5780580).

Almost surely, 2^42020307 is an apocalyptic number.

42020307 is a deficient number, since it is larger than the sum of its proper divisors (27346653).

42020307 is a wasteful number, since it uses less digits than its factorization.

42020307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667002 (or 666999 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 42020307 is about 6482.3072281403. The cubic root of 42020307 is about 347.6586774250.

The spelling of 42020307 in words is "forty-two million, twenty thousand, three hundred seven".