42556501 has 8 divisors (see below), whose sum is σ = 45888920. Its totient is φ = 39232512.

The previous prime is 42556499. The next prime is 42556567. The reversal of 42556501 is 10565524.

It can be written as a sum of positive squares in 4 ways, for example, as 16597476 + 25959025 = 4074^2 + 5095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42556501 - 2¹ = 42556499 is a prime.

It is a super-2 number, since 2×42556501² = 3622111554726002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42556501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11845 + ... + 15013.

It is an arithmetic number, because the mean of its divisors is an integer number (5736115).

Almost surely, 2^42556501 is an apocalyptic number.

It is an amenable number.

42556501 is a deficient number, since it is larger than the sum of its proper divisors (3332419).

42556501 is a wasteful number, since it uses less digits than its factorization.

42556501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 42556501 is about 6523.5343947894. The cubic root of 42556501 is about 349.1311811355.

The spelling of 42556501 in words is "forty-two million, five hundred fifty-six thousand, five hundred one".