42006511 has 8 divisors (see below), whose sum is σ = 44841600. Its totient is φ = 39233880.

The previous prime is 42006493. The next prime is 42006551. The reversal of 42006511 is 11560024.

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 42006511 - 2¹⁹ = 41482223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42006551) 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, 14221 + ... + 16918.

It is an arithmetic number, because the mean of its divisors is an integer number (5605200).

Almost surely, 2^42006511 is an apocalyptic number.

42006511 is the 2899-th centered decagonal number.

42006511 is a deficient number, since it is larger than the sum of its proper divisors (2835089).

42006511 is a wasteful number, since it uses less digits than its factorization.

42006511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31229.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 42006511 is about 6481.2430134967. The cubic root of 42006511 is about 347.6206257903.

Adding to 42006511 its reverse (11560024), we get a palindrome (53566535).

The spelling of 42006511 in words is "forty-two million, six thousand, five hundred eleven".