2405252657 has 4 divisors (see below), whose sum is σ = 2417715300. Its totient is φ = 2392790016.

The previous prime is 2405252611. The next prime is 2405252677. The reversal of 2405252657 is 7562525042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7562525042 = 2 ⋅3781262521.

It can be written as a sum of positive squares in 2 ways, for example, as 1276561441 + 1128691216 = 35729^2 + 33596^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405252657 - 2¹⁸ = 2404990513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2405252657.

It is not an unprimeable number, because it can be changed into a prime (2405252677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6231032 + ... + 6231417.

It is an arithmetic number, because the mean of its divisors is an integer number (604428825).

Almost surely, 2^2405252657 is an apocalyptic number.

It is an amenable number.

2405252657 is a deficient number, since it is larger than the sum of its proper divisors (12462643).

2405252657 is a wasteful number, since it uses less digits than its factorization.

2405252657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12462642.

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 2405252657 is about 49043.3752610890. The cubic root of 2405252657 is about 1339.8419389194.

Adding to 2405252657 its reverse (7562525042), we get a palindrome (9967777699).

The spelling of 2405252657 in words is "two billion, four hundred five million, two hundred fifty-two thousand, six hundred fifty-seven".