42271749 has 24 divisors (see below), whose sum is σ = 65985920. Its totient is φ = 25922592.

The previous prime is 42271721. The next prime is 42271771. The reversal of 42271749 is 94717224.

It is not a de Polignac number, because 42271749 - 2⁹ = 42271237 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42271049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50952 + ... + 51774.

Almost surely, 2^42271749 is an apocalyptic number.

It is an amenable number.

42271749 is a deficient number, since it is larger than the sum of its proper divisors (23714171).

42271749 is a wasteful number, since it uses less digits than its factorization.

42271749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1278 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 42271749 is about 6501.6727847532. The cubic root of 42271749 is about 348.3507413037.

The spelling of 42271749 in words is "forty-two million, two hundred seventy-one thousand, seven hundred forty-nine".