642472311 has 16 divisors (see below), whose sum is σ = 923426784. Its totient is φ = 394980864.

The previous prime is 642472297. The next prime is 642472361. The reversal of 642472311 is 113274246.

It is not a de Polignac number, because 642472311 - 2⁶ = 642472247 is a prime.

It is a super-3 number, since 3×642472311³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642472361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35275 + ... + 50291.

It is an arithmetic number, because the mean of its divisors is an integer number (57714174).

Almost surely, 2^642472311 is an apocalyptic number.

642472311 is a deficient number, since it is larger than the sum of its proper divisors (280954473).

642472311 is a wasteful number, since it uses less digits than its factorization.

642472311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130.

The product of its digits is 8064, while the sum is 30.

The square root of 642472311 is about 25347.0375192053. The cubic root of 642472311 is about 862.8821236419.

The spelling of 642472311 in words is "six hundred forty-two million, four hundred seventy-two thousand, three hundred eleven".