42945061 has 2 divisors, whose sum is σ = 42945062. Its totient is φ = 42945060.

The previous prime is 42945059. The next prime is 42945079. The reversal of 42945061 is 16054924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 3330625 = 6294^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 42945061 - 2¹ = 42945059 is a prime.

Together with 42945059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42945361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472530 + 21472531.

It is an arithmetic number, because the mean of its divisors is an integer number (21472531).

Almost surely, 2^42945061 is an apocalyptic number.

It is an amenable number.

42945061 is a deficient number, since it is larger than the sum of its proper divisors (1).

42945061 is an equidigital number, since it uses as much as digits as its factorization.

42945061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42945061 is about 6553.2481259296. The cubic root of 42945061 is about 350.1905384298.

Adding to 42945061 its reverse (16054924), we get a palindrome (58999985).

The spelling of 42945061 in words is "forty-two million, nine hundred forty-five thousand, sixty-one".