25716251 has 12 divisors (see below), whose sum is σ = 28490904. Its totient is φ = 23210220.

The previous prime is 25716241. The next prime is 25716259. The reversal of 25716251 is 15261752.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 25716251 - 2²² = 21521947 is a prime.

It is a super-2 number, since 2×25716251² = 1322651130990002, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (4200) is a multiple of the sum of its prime divisors (150).

It is not an unprimeable number, because it can be changed into a prime (25716259) 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 11 ways as a sum of consecutive naturals, for example, 184940 + ... + 185078.

It is an arithmetic number, because the mean of its divisors is an integer number (2374242).

Almost surely, 2^25716251 is an apocalyptic number.

25716251 is a deficient number, since it is larger than the sum of its proper divisors (2774653).

25716251 is an frugal number, since it uses more digits than its factorization.

25716251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 150 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 25716251 is about 5071.1193044534. The cubic root of 25716251 is about 295.1679633359.

The spelling of 25716251 in words is "twenty-five million, seven hundred sixteen thousand, two hundred fifty-one".