42801994 has 4 divisors (see below), whose sum is σ = 64202994. Its totient is φ = 21400996.

The previous prime is 42801977. The next prime is 42802043. The reversal of 42801994 is 49910824.

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., 25371369 + 17430625 = 5037^2 + 4175^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700497 + ... + 10700500.

Almost surely, 2^42801994 is an apocalyptic number.

42801994 is a deficient number, since it is larger than the sum of its proper divisors (21401000).

42801994 is a wasteful number, since it uses less digits than its factorization.

42801994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21400999.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 42801994 is about 6542.3232876403. The cubic root of 42801994 is about 349.8012313563.

The spelling of 42801994 in words is "forty-two million, eight hundred one thousand, nine hundred ninety-four".