25247071 has 4 divisors (see below), whose sum is σ = 25497144. Its totient is φ = 24997000.

The previous prime is 25247069. The next prime is 25247083. The reversal of 25247071 is 17074252.

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

It is a cyclic number.

It is not a de Polignac number, because 25247071 - 2¹ = 25247069 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 (25247011) 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, 124885 + ... + 125086.

It is an arithmetic number, because the mean of its divisors is an integer number (6374286).

Almost surely, 2^25247071 is an apocalyptic number.

25247071 is a deficient number, since it is larger than the sum of its proper divisors (250073).

25247071 is a wasteful number, since it uses less digits than its factorization.

25247071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250072.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 25247071 is about 5024.6463557150. The cubic root of 25247071 is about 293.3618712191.

The spelling of 25247071 in words is "twenty-five million, two hundred forty-seven thousand, seventy-one".