42543274 has 4 divisors (see below), whose sum is σ = 63814914. Its totient is φ = 21271636.

The previous prime is 42543269. The next prime is 42543287. The reversal of 42543274 is 47234524.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2537649 = 6325^2 + 1593^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10635817 + ... + 10635820.

Almost surely, 2^42543274 is an apocalyptic number.

42543274 is a deficient number, since it is larger than the sum of its proper divisors (21271640).

42543274 is a wasteful number, since it uses less digits than its factorization.

42543274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21271639.

The product of its digits is 26880, while the sum is 31.

The square root of 42543274 is about 6522.5205250731. The cubic root of 42543274 is about 349.0950061952.

Adding to 42543274 its reverse (47234524), we get a palindrome (89777798).

The spelling of 42543274 in words is "forty-two million, five hundred forty-three thousand, two hundred seventy-four".