42901729 has 4 divisors (see below), whose sum is σ = 46201876. Its totient is φ = 39601584.

The previous prime is 42901721. The next prime is 42901769. The reversal of 42901729 is 92710924.

It is a happy number.

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 21529600 + 21372129 = 4640^2 + 4623^2 .

It is a cyclic number.

It is not a de Polignac number, because 42901729 - 2³ = 42901721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42901694 and 42901703.

It is not an unprimeable number, because it can be changed into a prime (42901721) 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 in 3 ways as a sum of consecutive naturals, for example, 1650054 + ... + 1650079.

It is an arithmetic number, because the mean of its divisors is an integer number (11550469).

Almost surely, 2^42901729 is an apocalyptic number.

It is an amenable number.

42901729 is a deficient number, since it is larger than the sum of its proper divisors (3300147).

42901729 is a wasteful number, since it uses less digits than its factorization.

42901729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300146.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 42901729 is about 6549.9411447737. The cubic root of 42901729 is about 350.0727168639.

The spelling of 42901729 in words is "forty-two million, nine hundred one thousand, seven hundred twenty-nine".