42561011 has 8 divisors (see below), whose sum is σ = 43004448. Its totient is φ = 42120000.

The previous prime is 42560977. The next prime is 42561031. The reversal of 42561011 is 11016524.

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 42561011 - 2¹⁴ = 42544627 is a prime.

It is a super-2 number, since 2×42561011² = 3622879314684242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42561031) 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, 78401 + ... + 78941.

It is an arithmetic number, because the mean of its divisors is an integer number (5375556).

Almost surely, 2^42561011 is an apocalyptic number.

42561011 is a deficient number, since it is larger than the sum of its proper divisors (443437).

42561011 is a wasteful number, since it uses less digits than its factorization.

42561011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 42561011 is about 6523.8800571439. The cubic root of 42561011 is about 349.1435139634.

Adding to 42561011 its reverse (11016524), we get a palindrome (53577535).

The spelling of 42561011 in words is "forty-two million, five hundred sixty-one thousand, eleven".