25997057 has 4 divisors (see below), whose sum is σ = 26152896. Its totient is φ = 25841220.

The previous prime is 25997047. The next prime is 25997087. The reversal of 25997057 is 75079952.

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 25997057 - 2¹⁴ = 25980673 is a prime.

It is a super-2 number, since 2×25997057² = 1351693945322498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25996999 and 25997017.

It is not an unprimeable number, because it can be changed into a prime (25997017) 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, 77669 + ... + 78002.

It is an arithmetic number, because the mean of its divisors is an integer number (6538224).

Almost surely, 2^25997057 is an apocalyptic number.

It is an amenable number.

25997057 is a deficient number, since it is larger than the sum of its proper divisors (155839).

25997057 is a wasteful number, since it uses less digits than its factorization.

25997057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155838.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 25997057 is about 5098.7309205331. The cubic root of 25997057 is about 296.2384286934.

The spelling of 25997057 in words is "twenty-five million, nine hundred ninety-seven thousand, fifty-seven".