42030865 has 4 divisors (see below), whose sum is σ = 50437044. Its totient is φ = 33624688.

The previous prime is 42030827. The next prime is 42030881. The reversal of 42030865 is 56803024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25765776 + 16265089 = 5076^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 42030865 - 2⁹ = 42030353 is a prime.

It is a super-2 number, since 2×42030865² = 3533187225296450, which contains 22 as substring.

It is a Duffinian 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, 4203082 + ... + 4203091.

It is an arithmetic number, because the mean of its divisors is an integer number (12609261).

Almost surely, 2^42030865 is an apocalyptic number.

It is an amenable number.

42030865 is a deficient number, since it is larger than the sum of its proper divisors (8406179).

42030865 is an equidigital number, since it uses as much as digits as its factorization.

42030865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406178.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42030865 is about 6483.1215475263. The cubic root of 42030865 is about 347.6877924981.

Adding to 42030865 its reverse (56803024), we get a palindrome (98833889).

The spelling of 42030865 in words is "forty-two million, thirty thousand, eight hundred sixty-five".