42400443 has 4 divisors (see below), whose sum is σ = 56533928. Its totient is φ = 28266960.

The previous prime is 42400427. The next prime is 42400459. The reversal of 42400443 is 34400424.

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

It is an interprime number because it is at equal distance from previous prime (42400427) and next prime (42400459).

It is not a de Polignac number, because 42400443 - 2⁴ = 42400427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42400403) 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, 7066738 + ... + 7066743.

It is an arithmetic number, because the mean of its divisors is an integer number (14133482).

Almost surely, 2^42400443 is an apocalyptic number.

42400443 is a deficient number, since it is larger than the sum of its proper divisors (14133485).

42400443 is a wasteful number, since it uses less digits than its factorization.

42400443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133484.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42400443 is about 6511.5622549431. The cubic root of 42400443 is about 348.7038946772.

Adding to 42400443 its reverse (34400424), we get a palindrome (76800867).

The spelling of 42400443 in words is "forty-two million, four hundred thousand, four hundred forty-three".