42781029 has 8 divisors (see below), whose sum is σ = 57424800. Its totient is φ = 28328976.

The previous prime is 42781019. The next prime is 42781031. The reversal of 42781029 is 92018724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42781029 - 2¹⁵ = 42748261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42781019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47407 + ... + 48300.

It is an arithmetic number, because the mean of its divisors is an integer number (7178100).

Almost surely, 2^42781029 is an apocalyptic number.

It is an amenable number.

42781029 is a deficient number, since it is larger than the sum of its proper divisors (14643771).

42781029 is a wasteful number, since it uses less digits than its factorization.

42781029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95859.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 42781029 is about 6540.7208318350. The cubic root of 42781029 is about 349.7441095588.

The spelling of 42781029 in words is "forty-two million, seven hundred eighty-one thousand, twenty-nine".