239421001 has 2 divisors, whose sum is σ = 239421002. Its totient is φ = 239421000.

The previous prime is 239420989. The next prime is 239421019. The reversal of 239421001 is 100124932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197430601 + 41990400 = 14051^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 239421001 - 2⁷ = 239420873 is a prime.

It is not a weakly prime, because it can be changed into another prime (239421601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119710500 + 119710501.

It is an arithmetic number, because the mean of its divisors is an integer number (119710501).

Almost surely, 2^239421001 is an apocalyptic number.

It is an amenable number.

239421001 is a deficient number, since it is larger than the sum of its proper divisors (1).

239421001 is an equidigital number, since it uses as much as digits as its factorization.

239421001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 239421001 is about 15473.2349881982. The cubic root of 239421001 is about 620.9463530749.

Adding to 239421001 its reverse (100124932), we get a palindrome (339545933).

The spelling of 239421001 in words is "two hundred thirty-nine million, four hundred twenty-one thousand, one".