642407111 has 8 divisors (see below), whose sum is σ = 648462000. Its totient is φ = 636372288.

The previous prime is 642407107. The next prime is 642407131. The reversal of 642407111 is 111704246.

642407111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642407111 - 2² = 642407107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642407131) 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, 63665 + ... + 73061.

It is an arithmetic number, because the mean of its divisors is an integer number (81057750).

Almost surely, 2^642407111 is an apocalyptic number.

642407111 is a deficient number, since it is larger than the sum of its proper divisors (6054889).

642407111 is a wasteful number, since it uses less digits than its factorization.

642407111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 642407111 is about 25345.7513402148. The cubic root of 642407111 is about 862.8529333734.

The spelling of 642407111 in words is "six hundred forty-two million, four hundred seven thousand, one hundred eleven".