42452729 has 12 divisors (see below), whose sum is σ = 47157012. Its totient is φ = 38184960.

The previous prime is 42452719. The next prime is 42452731. The reversal of 42452729 is 92725424.

It can be written as a sum of positive squares in 2 ways, for example, as 6512704 + 35940025 = 2552^2 + 5995^2 .

It is not a de Polignac number, because 42452729 - 2⁴ = 42452713 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42452719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9929 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (3929751).

Almost surely, 2^42452729 is an apocalyptic number.

It is an amenable number.

42452729 is a deficient number, since it is larger than the sum of its proper divisors (4704283).

42452729 is a wasteful number, since it uses less digits than its factorization.

42452729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736 (or 3725 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 42452729 is about 6515.5758763136. The cubic root of 42452729 is about 348.8471702445.

The spelling of 42452729 in words is "forty-two million, four hundred fifty-two thousand, seven hundred twenty-nine".