42451443 has 6 divisors (see below), whose sum is σ = 61318764. Its totient is φ = 28300956.

The previous prime is 42451439. The next prime is 42451457. The reversal of 42451443 is 34415424.

It is a happy number.

It is not a de Polignac number, because 42451443 - 2² = 42451439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42451483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2358405 + ... + 2358422.

It is an arithmetic number, because the mean of its divisors is an integer number (10219794).

Almost surely, 2^42451443 is an apocalyptic number.

42451443 is a deficient number, since it is larger than the sum of its proper divisors (18867321).

42451443 is a wasteful number, since it uses less digits than its factorization.

42451443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716833 (or 4716830 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 42451443 is about 6515.4771889709. The cubic root of 42451443 is about 348.8436477227.

Adding to 42451443 its reverse (34415424), we get a palindrome (76866867).

The spelling of 42451443 in words is "forty-two million, four hundred fifty-one thousand, four hundred forty-three".