42251543 has 12 divisors (see below), whose sum is σ = 44634432. Its totient is φ = 39953760.

The previous prime is 42251513. The next prime is 42251549. The reversal of 42251543 is 34515224.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-42251543 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 (42251549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68171 + ... + 68787.

It is an arithmetic number, because the mean of its divisors is an integer number (3719536).

Almost surely, 2^42251543 is an apocalyptic number.

42251543 is a deficient number, since it is larger than the sum of its proper divisors (2382889).

42251543 is an equidigital number, since it uses as much as digits as its factorization.

42251543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 695 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 42251543 is about 6500.1186912240. The cubic root of 42251543 is about 348.2952282873.

Adding to 42251543 its reverse (34515224), we get a palindrome (76766767).

The spelling of 42251543 in words is "forty-two million, two hundred fifty-one thousand, five hundred forty-three".