42706445 has 4 divisors (see below), whose sum is σ = 51247740. Its totient is φ = 34165152.

The previous prime is 42706441. The next prime is 42706451. The reversal of 42706445 is 54460724.

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 31967716 + 10738729 = 5654^2 + 3277^2 .

It is a cyclic number.

It is not a de Polignac number, because 42706445 - 2² = 42706441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42706441) 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, 4270640 + ... + 4270649.

It is an arithmetic number, because the mean of its divisors is an integer number (12811935).

Almost surely, 2^42706445 is an apocalyptic number.

It is an amenable number.

42706445 is a deficient number, since it is larger than the sum of its proper divisors (8541295).

42706445 is an equidigital number, since it uses as much as digits as its factorization.

42706445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541294.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 42706445 is about 6535.0168324190. The cubic root of 42706445 is about 349.5407445865.

The spelling of 42706445 in words is "forty-two million, seven hundred six thousand, four hundred forty-five".