42051794 has 4 divisors (see below), whose sum is σ = 63077694. Its totient is φ = 21025896.

The previous prime is 42051767. The next prime is 42051799. The reversal of 42051794 is 49715024.

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., 37662769 + 4389025 = 6137^2 + 2095^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42051794.

It is not an unprimeable number, because it can be changed into a prime (42051799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512947 + ... + 10512950.

Almost surely, 2^42051794 is an apocalyptic number.

42051794 is a deficient number, since it is larger than the sum of its proper divisors (21025900).

42051794 is a wasteful number, since it uses less digits than its factorization.

42051794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025899.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 42051794 is about 6484.7354610655. The cubic root of 42051794 is about 347.7454925584.

The spelling of 42051794 in words is "forty-two million, fifty-one thousand, seven hundred ninety-four".