42052949 has 2 divisors, whose sum is σ = 42052950. Its totient is φ = 42052948.

The previous prime is 42052939. The next prime is 42052961. The reversal of 42052949 is 94925024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26450449 + 15602500 = 5143^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 42052949 - 2²⁰ = 41004373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42052919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21026474 + 21026475.

It is an arithmetic number, because the mean of its divisors is an integer number (21026475).

Almost surely, 2^42052949 is an apocalyptic number.

It is an amenable number.

42052949 is a deficient number, since it is larger than the sum of its proper divisors (1).

42052949 is an equidigital number, since it uses as much as digits as its factorization.

42052949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 42052949 is about 6484.8245157444. The cubic root of 42052949 is about 347.7486762701.

The spelling of 42052949 in words is "forty-two million, fifty-two thousand, nine hundred forty-nine".