42450665 has 4 divisors (see below), whose sum is σ = 50940804. Its totient is φ = 33960528.

The previous prime is 42450659. The next prime is 42450671. The reversal of 42450665 is 56605424.

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 (42450659) and next prime (42450671).

It can be written as a sum of positive squares in 2 ways, for example, as 16613776 + 25836889 = 4076^2 + 5083^2 .

It is a cyclic number.

It is not a de Polignac number, because 42450665 - 2⁶ = 42450601 is a prime.

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, 4245062 + ... + 4245071.

It is an arithmetic number, because the mean of its divisors is an integer number (12735201).

Almost surely, 2^42450665 is an apocalyptic number.

It is an amenable number.

42450665 is a deficient number, since it is larger than the sum of its proper divisors (8490139).

42450665 is an equidigital number, since it uses as much as digits as its factorization.

42450665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490138.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 42450665 is about 6515.4174847050. The cubic root of 42450665 is about 348.8415166447.

The spelling of 42450665 in words is "forty-two million, four hundred fifty thousand, six hundred sixty-five".