241639 has 2 divisors, whose sum is σ = 241640. Its totient is φ = 241638.

The previous prime is 241603. The next prime is 241643. The reversal of 241639 is 936142.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 241639 - 2⁷ = 241511 is a prime.

241639 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120819 + 120820.

It is an arithmetic number, because the mean of its divisors is an integer number (120820).

2²⁴¹⁶³⁹ is an apocalyptic number.

241639 is a deficient number, since it is larger than the sum of its proper divisors (1).

241639 is an equidigital number, since it uses as much as digits as its factorization.

241639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 241639 is about 491.5678996843. The cubic root of 241639 is about 62.2857946961.

The spelling of 241639 in words is "two hundred forty-one thousand, six hundred thirty-nine".