25570897 has 8 divisors (see below), whose sum is σ = 27951840. Its totient is φ = 23199360.

The previous prime is 25570891. The next prime is 25570901. The reversal of 25570897 is 79807552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25570897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25570891) 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 7 ways as a sum of consecutive naturals, for example, 4129 + ... + 8257.

It is an arithmetic number, because the mean of its divisors is an integer number (3493980).

Almost surely, 2^25570897 is an apocalyptic number.

25570897 is the 4129-th pentagonal number.

It is an amenable number.

25570897 is a deficient number, since it is larger than the sum of its proper divisors (2380943).

25570897 is a wasteful number, since it uses less digits than its factorization.

25570897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 25570897 is about 5056.7674457107. The cubic root of 25570897 is about 294.6107938251.

The spelling of 25570897 in words is "twenty-five million, five hundred seventy thousand, eight hundred ninety-seven".