2458661 has 2 divisors, whose sum is σ = 2458662. Its totient is φ = 2458660.

The previous prime is 2458639. The next prime is 2458663. The reversal of 2458661 is 1668542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 649636 = 1345^2 + 806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2458661 is a prime.

Together with 2458663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2458663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1229330 + 1229331.

It is an arithmetic number, because the mean of its divisors is an integer number (1229331).

2^2458661 is an apocalyptic number.

It is an amenable number.

2458661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2458661 is an equidigital number, since it uses as much as digits as its factorization.

2458661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 2458661 is about 1568.0117984250. The cubic root of 2458661 is about 134.9686438378.

It can be divided in two parts, 24 and 58661, that added together give a palindrome (58685).

The spelling of 2458661 in words is "two million, four hundred fifty-eight thousand, six hundred sixty-one".