42281794 has 4 divisors (see below), whose sum is σ = 63422694. Its totient is φ = 21140896.

The previous prime is 42281791. The next prime is 42281803. The reversal of 42281794 is 49718224.

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., 36156169 + 6125625 = 6013^2 + 2475^2 .

It is not an unprimeable number, because it can be changed into a prime (42281791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570447 + ... + 10570450.

Almost surely, 2^42281794 is an apocalyptic number.

42281794 is a deficient number, since it is larger than the sum of its proper divisors (21140900).

42281794 is a wasteful number, since it uses less digits than its factorization.

42281794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21140899.

The product of its digits is 32256, while the sum is 37.

The square root of 42281794 is about 6502.4452323722. The cubic root of 42281794 is about 348.3783318825.

The spelling of 42281794 in words is "forty-two million, two hundred eighty-one thousand, seven hundred ninety-four".