25342661 has 4 divisors (see below), whose sum is σ = 25627500. Its totient is φ = 25057824.

The previous prime is 25342657. The next prime is 25342673. The reversal of 25342661 is 16624352.

25342661 = 489² + 490² + ... + 577².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10857025 + 14485636 = 3295^2 + 3806^2 .

It is a cyclic number.

It is not a de Polignac number, because 25342661 - 2² = 25342657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25342651) 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 in 3 ways as a sum of consecutive naturals, for example, 142286 + ... + 142463.

It is an arithmetic number, because the mean of its divisors is an integer number (6406875).

Almost surely, 2^25342661 is an apocalyptic number.

It is an amenable number.

25342661 is a deficient number, since it is larger than the sum of its proper divisors (284839).

25342661 is an equidigital number, since it uses as much as digits as its factorization.

25342661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284838.

The product of its digits is 8640, while the sum is 29.

The square root of 25342661 is about 5034.1494812927. The cubic root of 25342661 is about 293.7316453901.

The spelling of 25342661 in words is "twenty-five million, three hundred forty-two thousand, six hundred sixty-one".