25706497 has 4 divisors (see below), whose sum is σ = 25747120. Its totient is φ = 25665876.

The previous prime is 25706489. The next prime is 25706501. The reversal of 25706497 is 79460752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25706497 - 2³ = 25706489 is a prime.

It is a super-2 number, since 2×25706497² = 1321647976022018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25706797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19347 + ... + 20632.

It is an arithmetic number, because the mean of its divisors is an integer number (6436780).

It is a Proth number, since it is equal to 1569 ⋅ 2¹⁴ + 1 and 1569 < 2¹⁴.

Almost surely, 2^25706497 is an apocalyptic number.

It is an amenable number.

25706497 is a deficient number, since it is larger than the sum of its proper divisors (40623).

25706497 is an equidigital number, since it uses as much as digits as its factorization.

25706497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40622.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 25706497 is about 5070.1574926229. The cubic root of 25706497 is about 295.1306402129.

The spelling of 25706497 in words is "twenty-five million, seven hundred six thousand, four hundred ninety-seven".