2458639 has 2 divisors, whose sum is σ = 2458640. Its totient is φ = 2458638.

The previous prime is 2458633. The next prime is 2458661. The reversal of 2458639 is 9368542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2458639 - 2⁵ = 2458607 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁸ + 5³ + 8⁷ + 6⁶ + 3¹⁰ + 9⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 2458598 and 2458607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2458633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1229319 + 1229320.

It is an arithmetic number, because the mean of its divisors is an integer number (1229320).

2^2458639 is an apocalyptic number.

2458639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2458639 is an equidigital number, since it uses as much as digits as its factorization.

2458639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 2458639 is about 1568.0047831560. The cubic root of 2458639 is about 134.9682412719.

Subtracting 2458639 from its reverse (9368542), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2458639 in words is "two million, four hundred fifty-eight thousand, six hundred thirty-nine".