42729946 has 8 divisors (see below), whose sum is σ = 73251360. Its totient is φ = 18312828.

The previous prime is 42729943. The next prime is 42729949. The reversal of 42729946 is 64992724.

It is an interprime number because it is at equal distance from previous prime (42729943) and next prime (42729949).

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

It is not an unprimeable number, because it can be changed into a prime (42729941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526056 + ... + 1526083.

It is an arithmetic number, because the mean of its divisors is an integer number (9156420).

Almost surely, 2^42729946 is an apocalyptic number.

42729946 is a deficient number, since it is larger than the sum of its proper divisors (30521414).

42729946 is a wasteful number, since it uses less digits than its factorization.

42729946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052148.

The product of its digits is 217728, while the sum is 43.

The square root of 42729946 is about 6536.8146677109. The cubic root of 42729946 is about 349.6048492800.

The spelling of 42729946 in words is "forty-two million, seven hundred twenty-nine thousand, nine hundred forty-six".