42770345 has 4 divisors (see below), whose sum is σ = 51324420. Its totient is φ = 34216272.

The previous prime is 42770341. The next prime is 42770347. The reversal of 42770345 is 54307724.

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 8042896 + 34727449 = 2836^2 + 5893^2 .

It is a cyclic number.

It is not a de Polignac number, because 42770345 - 2² = 42770341 is a prime.

It is a super-2 number, since 2×42770345² = 3658604822838050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42770341) 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, 4277030 + ... + 4277039.

It is an arithmetic number, because the mean of its divisors is an integer number (12831105).

Almost surely, 2^42770345 is an apocalyptic number.

It is an amenable number.

42770345 is a deficient number, since it is larger than the sum of its proper divisors (8554075).

42770345 is an equidigital number, since it uses as much as digits as its factorization.

42770345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554074.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 42770345 is about 6539.9040512839. The cubic root of 42770345 is about 349.7149924691.

The spelling of 42770345 in words is "forty-two million, seven hundred seventy thousand, three hundred forty-five".