42631447 has 4 divisors (see below), whose sum is σ = 43622920. Its totient is φ = 41639976.

The previous prime is 42631441. The next prime is 42631469. The reversal of 42631447 is 74413624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42631447 - 2¹¹ = 42629399 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 (42631441) 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, 495672 + ... + 495757.

It is an arithmetic number, because the mean of its divisors is an integer number (10905730).

Almost surely, 2^42631447 is an apocalyptic number.

42631447 is a deficient number, since it is larger than the sum of its proper divisors (991473).

42631447 is an equidigital number, since it uses as much as digits as its factorization.

42631447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991472.

The product of its digits is 16128, while the sum is 31.

The square root of 42631447 is about 6529.2761467103. The cubic root of 42631447 is about 349.3360118871.

The spelling of 42631447 in words is "forty-two million, six hundred thirty-one thousand, four hundred forty-seven".