42007285 has 4 divisors (see below), whose sum is σ = 50408748. Its totient is φ = 33605824.

The previous prime is 42007279. The next prime is 42007291. The reversal of 42007285 is 58270024.

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

It is an interprime number because it is at equal distance from previous prime (42007279) and next prime (42007291).

It can be written as a sum of positive squares in 2 ways, for example, as 32160241 + 9847044 = 5671^2 + 3138^2 .

It is a cyclic number.

It is not a de Polignac number, because 42007285 - 2¹¹ = 42005237 is a prime.

It is a super-2 number, since 2×42007285² = 3529223986142450, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200724 + ... + 4200733.

It is an arithmetic number, because the mean of its divisors is an integer number (12602187).

Almost surely, 2^42007285 is an apocalyptic number.

It is an amenable number.

42007285 is a deficient number, since it is larger than the sum of its proper divisors (8401463).

42007285 is an equidigital number, since it uses as much as digits as its factorization.

42007285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401462.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42007285 is about 6481.3027239900. The cubic root of 42007285 is about 347.6227608300.

The spelling of 42007285 in words is "forty-two million, seven thousand, two hundred eighty-five".