42020656 has 10 divisors (see below), whose sum is σ = 81415052. Its totient is φ = 21010320.

The previous prime is 42020639. The next prime is 42020669. The reversal of 42020656 is 65602024.

It is a self number, because there is not a number n which added to its sum of digits gives 42020656.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313130 + ... + 1313161.

Almost surely, 2^42020656 is an apocalyptic number.

It is an amenable number.

42020656 is a deficient number, since it is larger than the sum of its proper divisors (39394396).

42020656 is a wasteful number, since it uses less digits than its factorization.

42020656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626299 (or 2626293 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 42020656 is about 6482.3341475120. The cubic root of 42020656 is about 347.6596399163.

The spelling of 42020656 in words is "forty-two million, twenty thousand, six hundred fifty-six".