42004646 has 4 divisors (see below), whose sum is σ = 63006972. Its totient is φ = 21002322.

The previous prime is 42004639. The next prime is 42004663. The reversal of 42004646 is 64640024.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501160 + ... + 10501163.

It is an arithmetic number, because the mean of its divisors is an integer number (15751743).

Almost surely, 2^42004646 is an apocalyptic number.

42004646 is a deficient number, since it is larger than the sum of its proper divisors (21002326).

42004646 is a wasteful number, since it uses less digits than its factorization.

42004646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21002325.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 42004646 is about 6481.0991351776. The cubic root of 42004646 is about 347.6154811746.

The spelling of 42004646 in words is "forty-two million, four thousand, six hundred forty-six".