2401639 has 2 divisors, whose sum is σ = 2401640. Its totient is φ = 2401638.

The previous prime is 2401621. The next prime is 2401667. The reversal of 2401639 is 9361042.

2401639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2401639 - 2⁹ = 2401127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2401669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200819 + 1200820.

It is an arithmetic number, because the mean of its divisors is an integer number (1200820).

2^2401639 is an apocalyptic number.

2401639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401639 is an equidigital number, since it uses as much as digits as its factorization.

2401639 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2401639 is about 1549.7222331760. The cubic root of 2401639 is about 133.9170608757.

It can be divided in two parts, 2 and 401639, that multiplied together give a triangular number (803278 = T₁₂₆₇).

The spelling of 2401639 in words is "two million, four hundred one thousand, six hundred thirty-nine".