42447261 has 8 divisors (see below), whose sum is σ = 56674144. Its totient is φ = 28259280.

The previous prime is 42447257. The next prime is 42447263. The reversal of 42447261 is 16274424.

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

It is not a de Polignac number, because 42447261 - 2² = 42447257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42447263) 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, 7075 + ... + 11616.

It is an arithmetic number, because the mean of its divisors is an integer number (7084268).

Almost surely, 2^42447261 is an apocalyptic number.

It is an amenable number.

42447261 is a deficient number, since it is larger than the sum of its proper divisors (14226883).

42447261 is a wasteful number, since it uses less digits than its factorization.

42447261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19451.

The product of its digits is 10752, while the sum is 30.

The square root of 42447261 is about 6515.1562529229. The cubic root of 42447261 is about 348.8321921872.

The spelling of 42447261 in words is "forty-two million, four hundred forty-seven thousand, two hundred sixty-one".