42053749 has 2 divisors, whose sum is σ = 42053750. Its totient is φ = 42053748.

The previous prime is 42053717. The next prime is 42053761. The reversal of 42053749 is 94735024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37822500 + 4231249 = 6150^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 42053749 - 2⁵ = 42053717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42053779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21026874 + 21026875.

It is an arithmetic number, because the mean of its divisors is an integer number (21026875).

Almost surely, 2^42053749 is an apocalyptic number.

It is an amenable number.

42053749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42053749 is an equidigital number, since it uses as much as digits as its factorization.

42053749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 42053749 is about 6484.8861979221. The cubic root of 42053749 is about 347.7508814043.

The spelling of 42053749 in words is "forty-two million, fifty-three thousand, seven hundred forty-nine".