642141231 has 16 divisors (see below), whose sum is σ = 877088256. Its totient is φ = 417666816.

The previous prime is 642141217. The next prime is 642141239. The reversal of 642141231 is 132141246.

It is not a de Polignac number, because 642141231 - 2⁶ = 642141167 is a prime.

It is a super-2 number, since 2×642141231² = 824690721100390722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642141239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140031 + ... + 144543.

It is an arithmetic number, because the mean of its divisors is an integer number (54818016).

Almost surely, 2^642141231 is an apocalyptic number.

642141231 is a deficient number, since it is larger than the sum of its proper divisors (234947025).

642141231 is a wasteful number, since it uses less digits than its factorization.

642141231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5662.

The product of its digits is 1152, while the sum is 24.

The square root of 642141231 is about 25340.5057368633. The cubic root of 642141231 is about 862.7338775123.

Adding to 642141231 its reverse (132141246), we get a palindrome (774282477).

The spelling of 642141231 in words is "six hundred forty-two million, one hundred forty-one thousand, two hundred thirty-one".